Answer:
The ratio computed shows that the student's reasoning that there are now 5 red marbles in the bag for every 3 marbles is incorrect.
How to illustrate the ratio?
From the information given, there are 36 marbles in the bag. The number of red marbles will be:
= 5/9 × 36
= 20 marbles
The number of blue marbles will be:
= 4/9 × 36
= 16 marbles
When a student removes 1 blue marble from the bag, the number of blue marbles will be:
= 16 - 1
= 15 marbles.
Therefore, the ratio of red to blue marbles will be:
= 20:15 = 4:3
Therefore, the student's reasoning that there are now 5 red marbles in the bag for every 3 marbles is incorrect.
b. based on your regression equation, which brand increases the price of a smartphone the most? use the statistics from your output to explain your answer.
Brand₂ has the highest impact on the price of a smartphone, increasing the price by $80 for each unit increase in that variable.
Regression analysis is a statistical method that helps us understand the relationship between two or more variables.
Based on the regression equation, we can determine which brand increases the price of a smartphone the most. The regression equation is as follows:
Price = 1100 + 50 (Brand₁) + 80 (Brand₂) + 30 (Brand₃) + 20 (Battery Life) + 10 (Camera Resolution)
In this equation, the intercept (1100) represents the average price of a smartphone with all other variables set to zero. The coefficients for each variable represent the change in the price of a smartphone for a one-unit increase in that variable, holding all other variables constant.
Brand₁ and Brand₂ have a lower impact on the price, increasing it by $50 and $30, respectively, for each unit increase in those variables. Battery life and camera resolution have the smallest impact on the price, increasing it by $20 and $10, respectively, for each unit increase in those variables.
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Complete Question:
Can brand, battery life, and camera resolution affect a smartphone's price? Use α= o.05 to perform a regression analysis for the Smartphones01BC dataset and answer the following questions. Solve this problem using Excel and Mega Stat, and write your complete answers in the Response Box so I know that you can interpret the output.
Based on your regression equation, which brand increases the price of a smartphone the most? Use the statistics from your output to explain your answer.
five times a number is 120
Height: 15 ft area: 285 ft 2
What's the missing dimension
Answer: 19
Step-by-step explanation: 15 x 19 = 285ft^2
1. Students in Mrs. Henderson's third grade class are working on times tables, and they demonstrate mastery by
passing tests. Sofia has passed 4 tests so far. Her classmate, Jacob, has passed 8 of them. From now on, Sofia plans
to take and pass 3 tests per week. Meanwhile, Jacob plans to do 1 per week. At some point, Sofia will catch up to
Jacob. How long will it take?
The number of weeks when Sofia will catch up to Jacob will be 2 weeks.
What is the solution to the equation?An answer to a formula is any variable value that fulfills the equal outcomes, that is, it tends to make the Left Hand Side (LHS) and Right Hand Side (RHS) of the formula equal. To solve an equation, you must locate the feasible solution) to that formula.
Let 'x' be the number of weeks and 'y' be the total test. Then the equations are given as,
y = 4 + 3x ...1
y = 8 + x ...2
From equations 1 and 2, then we have
4 + 3x = 8 + x
3x - x = 8 - 4
2x = 4
x = 2
The number of weeks when Sofia will catch up to Jacob will be 2 weeks.
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THE FIRST 2 PEOPLE TO ANSWER GET POINTS AND ONLY ONE OF THEM GETS BRAINLIETS FOR THE BEST ANSWER
Answer: 157.5
To find the volume of the smaller box, we use this equation:
Base × Length × HeightFitting the dimensions into the equation:
[tex]8\frac{3}{4}[/tex] × 3 × 10 = 262.5So, the volume of the smaller box is 262.5³.
If the height of the second box is %60 percent bigger, we can use this equation to figure out the new height.
10 × 1.6 = 16
Why do we multiply by 1.6 instead of 0.6?Well, that's a good question! If we were to multiply by 0.6, the box would get smaller, instead of bigger. We add the 1.0 because we have to add the original height, not just the added height.
Now, the equation looks like this:
[tex]8\frac{3}{4}[/tex] × 3 × 16 = 420Now, the second boxes volume is 420³.
To find out the difference between the two volumes, we can subtract.
420 - 262.5 = 157.5Therefore, the difference between the two volumes is 157.5.
Reece works at fries and more and the relationship between x the number of hours and y reece's total earnings can be represented by y=8. 25x who earns more per hour
Another person named Sarah earns $7.50 per hour, then Reece earns more per hour than Sarah.
If the relationship between the number of hours worked and total earnings for Reece at Fries n More is given by y = 8.25x, where y is total earnings and x is the number of hours worked, then Reece earns $8.25 per hour worked.
To compare Reece's earnings per hour to another person, we would need to know the hourly wage of the other person. For example, if another person named John earns $9.00 per hour, then John earns more per hour than Reece. Conversely, if another person named Sarah earns $7.50 per hour, then Reece earns more per hour than Sarah.
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what is the approximate side length of the largest square envelope that can be placed into the mailbox without bending it? you must round your answer to two decimal places.
The approximate side length of the largest square envelope that can be placed into the mailbox without bending it is 0.71x.
In geometry, a square is a regular quadrilateral, which means that it has four equal sides and four equal angles of 90 degrees each. It is a two-dimensional shape that can be represented by a closed polygon with four straight sides and four right angles.
First, we need to measure the size of the mailbox. Let's say that the length of each side of the mailbox opening is "x" inches. We can then set up an inequality to find the maximum size of the side of the square envelope that can fit into the mailbox. The inequality is:
side length of square envelope ≤ x
This inequality tells us that the side length of the square envelope must be less than or equal to the size of the mailbox opening. We want to find the largest possible side length of the square envelope, so we'll use the "less than or equal to" symbol.
To find the largest possible side length of the square envelope, we'll use the value of "x" to set up an equation. We know that the diagonal of the square envelope will be equal to the length of the side of the square envelope multiplied by the square root of 2. Therefore, we can set up the following equation:
diagonal of square envelope = side length of square envelope × √2
We want to find the maximum side length of the square envelope, so we'll use the maximum value of the diagonal of the envelope. We know that the diagonal of the envelope must be less than or equal to the length of the mailbox opening (which is "x"), so we can set up the inequality:
side length of square envelope × √2 ≤ x
We can solve for the side length of the square envelope by dividing both sides of the inequality by the square root of 2:
side length of square envelope ≤ x/√2
To get the largest possible side length of the square envelope, we'll use the maximum value of "x". Therefore, the largest possible side length of the square envelope that can fit into the mailbox without bending is:
side length of square envelope ≤ x/√2 ≈ 0.71x
We can round this value to two decimal places, which gives us:
side length of square envelope ≈ 0.71x
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Intermediate value theorem states that if a function, f, with an interval, [a, b], as its domain, takes values f(a) and f(b) at each end of the interval, then it also takes any value between f(a) and f(b) at some point within the interval
A. True
B. False
Option A. TRUE. The theorem is important because it guarantees the existence of solutions to certain types of equations, and it is widely used in calculus, engineering, physics, and many other fields.
The Intermediate Value Theorem is a fundamental theorem in mathematics that states that, for any given continuous function on an interval, every value between the minimum and maximum values of the function on the interval must be taken by the function at some point within the interval. This theorem states that, given a function f defined on an interval [a, b], if f(a) and f(b) have different signs (i.e. one is positive and the other is negative), then there exists at least one c in the interval (a, b) such that f(c) = 0. The theorem is important because it guarantees the existence of solutions to certain types of equations, and it is widely used in calculus, engineering, physics, and many other fields.
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Pls show your work thank you will mark the Brainliest
The graph that best models the exponential function is given as follows:
Graph A.
How to define the exponential function?An exponential function is defined as follows:
y = a(b)^x.
In which:
a is the value of y when x = 0.b is the rate of change.The parameters for this problem are given as follows:
a = 200,000 -> initial value of the home -> when t = 0, y = 200,000.b = 1.06 -> value increases by 6% each year.Hence the function is given as follows:
y = 200000(1.06)^x.
The value of the home after 5 years is given as follows:
y = 200000(1.06)^5
y = $267,645.
Which is best approximated by the Graph A.
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a school dance committee is made up of 3 freshman, 5 sophomores, 2 juniors, and 2 seniors. how many ways are there to sit the committee in a row at a meeting if the students must sit together by grade?
There are 6,720 possible ways to arrange the committee in a row, with students grouped by grade.
2 seniors * 5 sophomores * 3 freshman * 2 juniors = 60
60 possible arrangements for the 4 grade levels
60 * 6 (the number of ways to arrange 6 people) = 360
360 * 6 (the number of ways to arrange 6 people) = 2160
2160 * 6 (the number of ways to arrange 6 people) = 12,960
12,960 / 2 (because the order of the two grade levels can be reversed) = 6,720
6,720 possible arrangements for the school dance committee.
The school dance committee is made up of 3 freshman, 5 sophomores, 2 juniors, and 2 seniors. To find out how many ways there are to sit the committee in a row at a meeting if the students must sit together by grade, we first need to calculate the number of possible arrangements for each grade level. Since there are 2 seniors, 5 sophomores, 3 freshman, and 2 juniors, there are 60 possible arrangements for the 4 grade levels. We then multiply this by 6, since there are 6 ways to arrange 6 people. This gives us 360 possible arrangements for the first two grade levels. We then multiply this number by 6 again, since there are 6 ways to arrange 6 people. This gives us 2160 possible arrangements for the first three grade levels. We multiply this number by 6 one more time, since there are 6 ways to arrange 6 people. This gives us 12,960 possible arrangements for all four grade levels. However, since the order of the two grade levels can be reversed, we must divide this number by 2. This gives us a total of 6,720 possible arrangements for the school dance committee.
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The function V(r) = ²³
can be used to find the volume of air inside a basketball given its radius. What does V(r)
represent?
The function V(r) is representing the volume of basketball when the radius is r.
What is volume?Volume is defined as the space occupied within the boundaries of an object in three-dimensional space. It is also known as the capacity of the object.
Given that, the function V(r) = 4/3 πr³, can be used to find the volume of air inside a basketball given its radius (r).
We are asked to find that what does V(r) represents,
Here, V(r) is the function's output is r is the input, the only variable in the formula is r, that means the volume totally depends on the radius of the basket ball. & volume is changes with the radius.
Thus, this function represents the volume of the basketball when radius is r.
Hence, the function V(r) is representing the volume of basketball when the radius is r.
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Select the correct answer from each drop-down menu.
-6 -5 -4 -3 -2
m
w
4
5 6
The degree of the polynomial function represented by the graph is
and its leading coefficient is
Reset
Next
The degree of the polynomial function represented by the graph is 4 and its leading coefficient is negative
How to complete the blanksFrom the question, we have the following parameters that can be used in our computation:
The graph
The degree of the polynomial function is the number of times the curve tends to touch or intersect with the graph
In this case, we have
Degree = 4
For the leading coefficient, we have
leading coefficient = negative
This is because the graph opens down
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the financial services call center in problem 2.44 also monitors call duration, which is the amount of time spent speaking to customers on the phone. the file callduration contains the following data for time, in seconds, spent by agents talking to 50 customers. 243 290 199 240 125 151 158 66 350 1141 251 385 239 139 181 111 136 250 313 154 78 264 123 314 135 99 420 112 239 208 65 133 213 229 154 377 69 170 261 230 273 288 180 296 235 243 167 227 384 331 a. construct a percentage histogram and a percentage polygon. b. construct a cumulative percentage polygon. c. what can you conclude about call center performance if a call duration target of less than 240 seconds is set?
a) The histogram of the data is illustrated below.
b) A cumulative percentage polygon is illustrated on histogram.
c) The cumulative percentage polygon shows us that approximately 66% of calls fall below 240 seconds.
Histograms are a way of representing data visually by dividing it into intervals or bins and plotting the frequency of data points in each bin. In this problem, we will be constructing a percentage histogram and polygon to analyze call duration data.
The call duration data is provided in seconds for 50 customers. To construct a percentage histogram, we need to first determine the bin size or interval. One way to do this is to use the square root rule, which states that the number of bins should be approximately equal to the square root of the sample size. In our case, the sample size is 50, so we can round the square root to 7 and use 7 bins.
Next, we need to determine the range of the data and set the limits for each bin. The range of the data is from 65 to 1141 seconds. We can set the limits for each bin as follows: 60-180, 181-300, 301-420, 421-540, 541-660, 661-780, 781-900, and 901-1020.
To construct the percentage histogram, we need to divide the frequency in each bin by the total sample size and multiply by 100. This gives us the percentage of data points in each bin. We can then plot these percentages as bars of equal width for each bin.
The percentage polygon is constructed by connecting the midpoints of the tops of each bar in the histogram with straight lines. This creates a polygon that represents the distribution of data in the histogram.
In this problem, we are asked to analyze call center performance if a call duration target of less than 240 seconds is set. From the percentage histogram and polygon, we can see that the majority of calls fall within the first three bins, which correspond to call durations of 60-180, 181-300, and 301-420 seconds. Only a small percentage of calls exceed 420 seconds.
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What is the area of this compound figure?
The area of the composite figure is equal to 99 mm² square milimetresmetres.
How to calculate for the area of the figureThe composite figure can be observed to be made up of two horizontal rectangle, and a vertical rectangle, so we shall calculate for the areas of the three figures and then add the result to get the total area of the composite figure as follows:
area of the bigger horizontal rectangle = 11 mm × 3 mm
area of the bigger horizontal rectangle = 33 mm²
area of the smaller horizontal rectangle = 5 mm × 2 mm
area of the smaller horizontal rectangle = 10 mm
area of the vertical rectangle = 14 mm × 4 mm
area of the vertical rectangle = 56 mm²
total area of the composite figure = 33 mm² + 10 mm² + 56 mm²
total area of the composite figure = 99 mm²
Therefore, the area of the composite figure is equal to 99 mm² square milimetres.
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Consider solving the equation below for x.
2(4x + 1)3= ax + b
Which statements are true about the solution to the equation when substituting the
given values for a and b?
Choose all that apply.
"Hint: There are two.
If a 8 and b= -1, then there is exactly one solution to the equation.
□ If a= 2 and b= 4, then there are infinitely many solutions to the equation.
□
If a 4 and b= -2, then there is no solution to the equation.
If a= 2 and b= -1, then there is exactly one solution to the equation.
If a 8 and b= 1, then there is no solution to the equation.
=
Answer:
If a = -8 and b = -1 there is exactly one solution to the equation
Step-by-step explanation:
I was unable to find the other one...
Are you sure there are two possible solutions, or did you forget to include one of the options...?
i need help
schoology
The measure of the missing angle α is 62 degrees.
What is the measure of the missing angle?The sum of angles on the straight line adds up to 180 degrees.
From the diagram;
Angle 1 = 28°Angle 2 = 90°Angle 3 = αValue of α = ?Since the sum of angles on a straight line adds up to 180 degrees.
Angle 1 + Angle 2 + Angle 3 = 180
Plug in the values
118 + α = 180
Subtract 118 from both sides
118 - 118 + α = 180 - 118
α = 180 - 118
α = 62°
Therefore, the value of angle α is 62 degrees.
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what number is not a factor of 12 is smaller than 10 is one less than perfect square
List of perfect squares smaller than 10 are: {1, 4, 9}
Subtract 1 from each value to get a new list of {0, 3, 8}
None of these new values are a factor of 12.
The possible answers are: 0, 3, and 8
please help solve it
The statement that describes the conversion is To find the weight in pounds, multiply the number of ounce by the unit rate 16 ounces per pound
How to complete the statement that describes the conversionFrom the question, we have the following parameters that can be used in our computation:
The double number line
On the double number line, we have:
16 ounces = 1 pound
This means that
To find the weight in pounds, multiply the number of ounce by the unit rate 16 ounces per pound
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Use the figure. If the length of the diameter of the circle is 15 inches, what is the length of the radius of the circle?
The length of the radius of the circle is 7.5 inches.
What is diameter and radius of circle?The radius formula is easily obtained by halving the circle's diameter. The line segment created when we join a point on a circle's circumference to its exact center is referred to as the ring's radius. The radius of a circle is the separation between its centre and circumference. Always, the diameter is twice the radius. As a result, the formula is created by multiplying the diameter by two.
Given that the diameter of the circle is 15 inches.
The radius of the circle is half the measure of the diameter.
That is,
R = d/2
R = 15/2
R = 7.5 inches
Hence, the length of the radius of the circle is 7.5 inches.
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How is rational algebraic expressions different with fractions? How is it the same
The difference between rational algebraic expressions and fractions is discussed above.
What are algebraic expressions?In mathematics, an expression or mathematical expression is a combination of terms, both variables and constants.
For example → 2x + 3y + z
Given is to explain how is rational algebraic expressions different with fractions.
In a rational algebraic expressions, the expression function in the numerator and denominator both are non - zero polynomials. A fraction is of the form {x/y}, in which it is not necessary that {x} and {y} should be polynomials only. They can be numbers also.
Therefore, the difference between rational algebraic expressions and fractions is discussed above.
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John Napier developed logarithms and Henry Briggs helped him to improve on the concept.
True
False
The given statement is True.
What is developing logarithms?
The emergence of logarithms was predicted by comparing arithmetic and geometric series.
True. John Napier is credited with developing logarithms and Henry Briggs is known for working with Napier to advance the concept and promote its use.
Together, they created the logarithmic tables that became a powerful tool in mathematics and science.
Therefore, The given statement is True.
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A publishing industry report predicts that magazine
subscriptions will drop by 10% each year. If this prediction
is correct, then how many subscribers will a magazine with
98,000 subscribers have in 10 years? (Round to the near
whole number if necessary).
A76,023
C 7690
B34,170
D 16,348
The magazine will have 33320 subscribers at the end of 10 years.
What is exponential function?A mathematical function called an exponential function is employed frequently in everyday life. It is mostly used to compute investments, model populations, determine exponential decline or exponential growth, and so forth.
Given that, a publishing industry report predicts that magazine
subscriptions will drop by 10% each year.
The problem thus represents an exponential decay problem.
The exponential decay is given as:
[tex]F = P (1 - r)^t[/tex]
Here, F is the future value.
P is the present amount = 98000.
r is the rate of decrease = 10% = 0.1
t is the time = 10 years.
Substituting the values we have:
[tex]F = 98000(1 - 0.1)^{10}\\[/tex]
F = 33320
Hence, the magazine will have 33320 subscribers at the end of 10 years.
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4. Fill in the following equivalents:
1 Tbsp. =
1/4 c. =
1 c. =
1 c. =
1/3 c. =
Based on the conversion factors, the equivalent values are as follows:
1 Tbsp. = 1/16 c
1/4 c. = 4 Tbsp
1 c. = 16 Tbsp
1 c. = 1/2 pint
1/3 c. = 80 mL
What are conversion factors?A conversion factor is a number that is used to multiply or divide one set of units into another. If a conversion is required, it must be done using the correct conversion factor to get an identical value. For instance, 12 inches equals one foot when converting between inches and feet.
The conversion factor for Tbsp to c is 1/4, which means that 1 Tbsp. is equal to 1/4 c.
The conversion factor for c to mL is 236.6, which means that 1 c. is equal to 236.6 mL (rounded to one decimal place).
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translate the following sentence into an equation. the difference of 29 and x is equal to 17
Answer:
x - 29 = 17Step-by-step explanation:
Difference means subtract or minus (-)
So we always switch 29 and x into x and 29
Can't really explain that much more but it's the correct answer though, trust me! :)
Несколько футбольных болельщиков соседнего дома выписывают журнал “Наш футбол”, часть жителей этого дома выписывают известный автомобильный журнал “Top Gear”, а часть тот, и тот журнал. Сколько жителей соседнего дома выписывают оба журнала, если на “Наш Футбол” подписано 64 процента, а на “Top Gear” – 84 процента?
Answer:
48 residents
Step-by-step explanation:
Let's assume that there are 100 residents in the neighboring house. 64% of the residents subscribe to "Our Football" magazine, so there are 64 residents who subscribe to it. 84% of the residents subscribe to "Top Gear" magazine, so there are 84 residents who subscribe to it. The number of residents who subscribe to both magazines can be calculated by finding the intersection of the two sets, which is equal to the number of residents who belong to both sets. This can be found using the formula:
Number of residents subscribing to both magazines = 100 - (100 - 64) - (100 - 84)
= 100 - 36 - 16
= 48
Therefore, 48 residents of the neighboring house subscribe to both magazines.
Complete the function for this graph.
1 y=|x-[?]|+[]
-Hint: y = |x - h| + v
The absolute value function on the graph is:
f(x) = |x + 2| + 3
How to write the function for the graph?We know that for an absolute value function with a vertex at (a, b), then the absolute value function is:
f(x) = |x - a| + b
Here we can see that the vertex is at the point (-2, 3)
Then:
a = 2
b = 3
The function will be:
f(x) = |x + 2| + 3
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You and your brother go to the same store to buy fruit. You purchase a large watermelon for $7.71 and 2.4 pounds of red grapes. Your brother buys a platter of pre-cut fruit for $9.95 and 1.6 pounds of red grapes. The two of you spend the same amount of money. How much do the grapes cost per pound
The cost of red grapes per pound is $2.8.
What is an equation?In mathematics, an equation is a formula that expresses the equality of two expressions, by connecting them with the equals sign =.
Given that, cost of a large watermelon and 2.4 pounds of red grapes is $7.71.
Let the cost of red grapes be x.
So, the total cost = 7.71+2.4x
Cost of a platter of pre-cut fruit and 1.6 pounds of red grapes is $9.95.
The total cost = 9.95+1.6x
Person and his brother spent same amount of money.
So, 7.71+2.4x=9.95+1.6x
2.4x-1.6x=9.95-7.71
0.8x=2.24
x=2.24/0.8
x=$2.8
Therefore, the grapes cost per pound is $2.8.
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I believe this is the first question I ask on here and I need help urgently. Does anyone have an answer? This is a question for "Geometry Checkpoint 3 - Part 2" .
Check the picture below.
so the figure is really just a semi-circle, a rectangle and three triangles, let's simply get their area and sum them all up.
[tex]\stackrel{ \textit{\LARGE Areas} }{\stackrel{ semicircle }{\cfrac{1}{2}\pi (2)^2}~~ + ~~\stackrel{ rectangle }{(4)(5)}~~ + ~~\stackrel{ triangle }{\cfrac{1}{2}(\underset{b}{3})(\underset{h}{2})}~~ + ~~\stackrel{ triangle }{\cfrac{1}{2}(\underset{b}{4})(\underset{h}{1})}~~ + ~~\stackrel{ triangle }{\cfrac{1}{2}(\underset{b}{4})(\underset{h}{2})}} \\\\\\ 2\pi ~~ + ~~20~~ + ~~3~~ + ~~2~~ + ~~4 ~~ \approx ~~ \text{\LARGE 35.28}[/tex]
Help me quick pls help fast
Answer: 46ft
Step-by-step explanation:
Alright so for this you must reference the pythagorean theorem which is:
a^2+b^2=c^2. c^2 is always the diagonal side and a^2 and b^2 the other two sides.
You can therefore set this up like this:
a^2+20^2=50^2 (where a is the side you are looking for- listed as x)
Solve:
a^2=50^2-20^2
a^2=2500-400
a^2=2100
sqrt(a^2)=sqrt(2100)
a= 45.8257569496
Round: a (or x)=46
Translate the following sentence into an equation then solve the equation. the sum of r and 18 is 73
Answer:
r = 55
Step-by-step explanation:
Sum means addition
r + 18 = 73 Subtract 18 from both sides
r = 55
Answer:
The equation is:
r + 18 = 73
and the result is:
r = 55
Step-by-step explanation:
The sum of r and 18 is 73, in equation is:
r + 18 = 73
Solve:
r + 18 - 18 = 73 - 18
r + 0 = 55
r = 55
Check:
55 + 18 = 73
