The solution is, Right answer: C) -7 is a solution.
What is equation?An equation is a mathematical statement that is made up of two expressions connected by an equal sign. In its simplest form in algebra, the definition of an equation is a mathematical statement that shows that two mathematical expressions are equal. For instance, 3x + 5 = 14 is an equation, in which 3x + 5 and 14 are two expressions separated by an 'equal' sign.
here, we have,
We have the equation 2x² +5x -63 = 0
First, let's find the coefficients a, b and c as ax² +bx +c = 0:
• a = 2
• b = 5,
• c = -63
Now, we will use the formula below to solve this equation:
x = -b ±√b²-4ac/2a
Let's replace the coefficients with the values that we already found:
putting the values we get,
x = -5±23/4
Now, let's divide it into two solutions, look:
x1 = 9/2
x2 = -7
Right answer: C) -7 is a solution.
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3. Zaidi says the table does not represent a function because all of the inputs have the same output 20. Is Zaidi correct?
From the table, the conclusion can be made that for any value of the input, the value of the output remains the same. Then the correct option is C.
What is a function?A function is an argument, concept, or regulation that demonstrates an association between two variables. Functions may be located throughout mathematics and are necessary for the expansion of significant linkages.
If the number of values of the variable 'y' is more than one for a given value of 'x', then it is not a function.
The table is given below.
x y
- 5 20
0 20
5 20
10 20
From the table, the conclusion can be made that for any value of the input, the value of the output remains the same. Then the correct option is C.
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The complete question is attached below.
pls help me its urgent ty
Each of the quadratic function should be factorized as follows;
x² - 6x + 8 ⇒ (x - 4)(x - 2).
x² - 4x - 32 ⇒ (x - 8)(x + 4).
x² + x - 42 ⇒ (x - 6)(x + 7).
What is a quadratic function?In Mathematics, the standard form of a quadratic function is given by this mathematical expression;
ax² + bx + c = 0
Where:
a and b represents the coefficients of the first and second term in the quadratic function.c represents the constant.Next, we would solve each of the quadratic function by using the factorization method as follows;
x² - 6x + 8 = 0
x² - 4x - 2x + 8 = 0
x(x - 4) - 2(x - 4) = 0
(x - 4)(x - 2) = 0
x² - 4x - 32 = 0
x² - 8x + 4x - 32 = 0
x(x - 8) + 4(x - 8) = 0
(x - 8)(x + 4) = 0
x² + x - 42 = 0
x² - 6x + 7x - 42 = 0
x(x - 6) + 7(x - 6) = 0
(x - 6)(x + 7) = 0
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Pls help thank you will mark the Brainliest
The exponential function that represents the given scenario is
y = (30.5)(0.7)ˣ.
The exponential function is a type of mathematical equation that can be used to determine if anything is increasing or decreasing exponentially, such as population, money, or price.
The general form of an exponential function is given by
f(x) = abˣ or y = abˣ
Where 'x' is a variable and a and b are constants
Here we have
The graph shows the number of games system sold since 2005.
As we know an exponential function is represented as:
=> y = abˣ
From the given graph x = 0 and y = 30.5
=> 30.5 = ab⁰
=> 30.5 = a(1)
=> a = 30.5
When x = 1, y = 21.35
=> 21.35 = (30.5)(b¹)
=> b = 0.7
So the required exponential function can be written as
=> y = (30.5)(0.7)ˣ
Therefore,
The exponential function that represents the given scenario is
y = (30.5)(0.7)ˣ.
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Noelle collects autographs of famous mathematicians. Exactly one statement below is true: • Noelle owns at least 77 autographs. • Noelle owns at least 62 autographs. • Noelle owns at least 45 autographs. What is the greatest number of autographs Noelle can own?
The greatest number of autographs that Noelle can own is given as follows:
61 autographs.
How to obtain the greatest number of autographs that Noelle can own?The greatest number of of autographs that Noelle can own is 61 autographs, as we would have that:
Noelle owns at least 45 autographs would be a true statement.Noelle owns at least 62 autographs would be a false statement.Noelle owns at least 77 autographs would be a false statement.Owning 62 autographs, the first two statements would be true, which is not possible, as exactly one of the statements is true.
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Tomas wants to make a line plot of the
distances he rode his bike last week. He
rode the following distances in miles:
3,4 1/2,6, 3, 5 1/2, 3, 5 1/2
Make a line plot for the distances
Tomas rode.
The line plot is attached based on the information given.
What is a line plot?A line plot is a graph that shows data as dots or checkmarks above a number line to indicate how frequently each value occurs. Only numerical, discrete data, not continuous data, is shown using line graphs. Line plots categorize the data by showing how often each value appears on a number line. Small data sets make these graphs easy to make, and the revealed frequency patterns allow for interpretation.
Each mark on the line plot represents one of the distances Tomas rode. The number on the horizontal axis represents the day of the week and the vertical axis represents the distance in miles. The line plot shows that on most days, Tomas rode between 3 and 5 1/2 miles.
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Given that axb2x c3x = 2, where a, b, and c are] positive real numbers, then x =
20. Mr. Lewinger has to choose 2 students to
lead the class field trip. If he draws from a
list of 6 boys and 6 girls, what is the
probability that the names of 2 girls will be
drawn?
A.5/24
B.5/22
C.1/7
D.5/6
Answer:
B. 5/22
----------------------
Total number of students is:
6 + 6 = 12Probability of a first girl is 6 of 12:
girls / total = 6/12 = 1/2Probability of a second girl is 5 of 11 since both numbers reduced by one:
girls / total = 5/11Probability of the two events is:
1/2*5/11 = 5/22Correct choice is B.
5. People Population The country of Elbonia was established in 2012. Its population at the time was 5
million and is growing at an annual rate of 3.2%. The neighboring country of Neecapia was established
at the same time. Its population was 4.1 million and is growing at an annual rate of 6.5%.
Answer:
Step-by-step explanation:
yes because the montly rate is 6.5%
A pole that is 3.5 tall casts a shadow that is 1.77 long. At the same time, a nearby building casts a shadow that is 43.5 long. How tall is the building? Round your answer to the nearest meter.
The height of the building is approximately 79.22 meters, rounded to the nearest meter.
To calculate the angle of elevation, we use the tangent function, which is defined as the ratio of the opposite side to the adjacent side of a right triangle.
We know that the pole is 3.5 meters tall, and its shadow is 1.77 meters long. We can use this information to calculate the angle of elevation of the sun's rays, which is the angle formed between the horizontal line and the line of sight from the top of the pole to the sun.
In this case, the opposite side is the height of the pole (3.5 meters), and the adjacent side is the length of the shadow (1.77 meters). Therefore, we have:
tan(angle of elevation) = opposite/adjacent = 3.5/1.77
Using a calculator, we can find that the angle of elevation is approximately 63.24 degrees.
Now, we can use this angle to find out the height of the building. We know that the shadow of the building is 43.5 meters long, and we want to find its height, which is the opposite side of the right triangle formed by the angle of elevation and the length of the shadow. Therefore, we have:
tan(63.24 degrees) = opposite/43.5
Solving for the opposite, we get:
opposite = 43.5 * tan(63.24 degrees) = 79.22 meters
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12x (3+2’2) divided by 2-10
Answer:
-5.5
Step-by-step explanation:
[12*(3/(2^2))]/2-10 [Rewritten to add brackets.
Use PEDMAS to determine order of operation.
P =- parentheses first:
[12*(3/(2^2))]/2-10
[12*(3/(4))]/2-10 [squared the 2]
[12*(3/4)]/2-10 [Removed excess parentheses]
[12*(3/4)]/2-10 [Next parenthses: 12*(3/4) Divide and Multioply]
[9]/2 - 10 [Divide and Multiply]
4.5 - 10 [Add/Subtract]
-5.5 Result
Andy bought cupcakes for his sister's birthday party. 75% of the 16 cupcakes had sprinkles on top. How many cupcakes had sprinkles?
Which investment results in the greatest total amount? Investment A: 3000$ invested for 7 years compounded semiannually at 7% Investment B: $5,000 invested for 4 years compounded quarterly at 3.2%.
With the given compound interests, Investment B results in greatest total amount.
What exactly is compound interest?
Compound interest is interest charged on a loan or deposit. It is the most widely utilised idea in our everyday lives. The compound interest for an amount is determined by both the principal and the interest earned over time. This is the primary distinction between compound and simple interest.
Compound interest calculation formula:
A=P(1+r/n)ⁿˣ
Where,
A Equals Amount
P stands for principal.
r = interest rate
n is the number of times interest is compounded each year.
x = time (in years)
Alternatively, the formula may be written as follows:
CI = A – P
Where CI stands for Compound Interest.
Now,
For A
principal = $3000, Rate = 7% compounded semiannualy and time = 7 years
amount=3000(1+7/200)¹⁴
A=3000*1.61
=$4856
For B
principal = $5000, Rate = 3.2% compounded quaterly and time = 4 years
amount = 5000(1+3.2/400)¹⁶
A=5000*1.13
=$5680
hence,
Investment B results in greatest total amount.
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A pole that is 2.8 m tall casts a shadow that is 1.01 m long. At the same time, a nearby tower casts a shadow that is 45.5 m long. How tall is the tower? Round
your answer to the nearest meter.
Answer: 147m
Step-by-step explanation: the tower's height can be calculated using the following equation: height = (shadow length/pole shadow length) * pole height Therefore, the tower's height is: height = (45.5/1.01) * 2.8 height = 146.5 m The tower's height is approximately 147 m, rounded to the nearest meter
You buy 1 box of dog food and 2 cans of cat food for $23. Your friend buys 2 boxes of dog food and 1 can of cat food for $22. What is the cost of each box of dog food?
One box of dog food costs $7, while one can of cat food costs $8.
What is an Equation?Equations are statements in mathematics that have two algebraic expressions on either side of the equals (=) sign.
It illustrates that the expressions printed on the left and right sides have an equal relationship.
Some of the components of an equation are coefficients, variables, operators, constants, terms, expressions, and the equal to sign. When expressing an equation, the "=" symbol and terms on both sides are a need.
Given data ,
Let the price of a single box of dog food at x.
Let's say the price of one can of cat food is y.
The cost of 1 box of dog food and 2 cans of cat food is = $ 23
One can of cat food and two boxes of dog food cost $22, total.
So , the equation will be
1x + 2y = 23 ....... (1)
2x + 1y = 22 ....... (2)
Equation (1) is multiplied by 2 to get
2x + 4y = 46 ....... (3)
When equation (2) is subtracted from equation (3), we obtain
3y = 24
value of y is obtained by dividing both sides by 3,
y = $ 8
Equation (1) can be solved by substituting the value of y.
x + [tex]2*8[/tex] = 23
x + 16 = 23
16 is subtracted from both sides, giving us
x = $ 7
Therefore , the value of x is $ 7 and value of y is $ 8
Thus, one package of dog food costs $7, while one can of cat food costs $8.
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Cindy’s square garden has a side lengths of x ft. She will plant 5 tulip bulbs per square foot. The function g(x) = 5x2 models the number of bulbs she will plant. How many bulbs will she plant if the garden has a side length of 8 feet?
The function g(x) = 5x²models the number of bulbs she will plant is if the garden has a side length of 8 feet, Cindy will plant 320 tulip bulbs.
What is Function?
A function is a mathematical rule that assigns a unique output value for every input value. In other words, a function is a relation between a set of inputs and a set of possible outputs with the property that each input is related to exactly one output.
Functions are often denoted using function notation, such as f(x), where "f" is the name of the function and "x" is the input. The output of the function is denoted by f(x), which is read as "f of x" and represents the value of the function at the input value x.
To find the number of bulbs Cindy will plant if the garden has a side length of 8 feet, we need to evaluate the function g(8) = 5(8)²
Using the order of operations, we first need to square the side length, which gives us 8² = 64.
Then, we multiply 64 by 5 to get the total number of bulbs:
g(8) = 5(64) = 320
Therefore, if the garden has a side length of 8 feet, Cindy will plant 320 tulip bulbs.
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In one trip to the hardware store you buy 15 boards, 3 boxes of nails, and a saw. One a second trip you buy 9 more boards and a box of nails. Define and use variables to represent the total cost.
The variables representing the total cost of the items bought are x and y.
Where X is the total cost of the items bought during the first trip and Y is the total cost of the items bought during the second trip.
Items bought on the first trip:
Boards = 15
Boxes of nails = 3
Total cost = x
Items bought on the second trip:
Boards = 9
Boxes of nails = 1
Total cost = y
Variables:Let a piece of board = b
Let a box of nails = n
Let the total cost for the first trip = x
Let the total cost for the second trip = y
Equations:x = 15b + 3n
y = 9b + n
freight train cars in a train yard there are tank cars, boxcars, and flatcars. how many ways can a train be made up consisting of tank cars, boxcars, and flatcars? (in this case, order is not important.)
The number of ways can a train made up consisting of tank cars, box cas and flat cars is 166320
Total number of tank cars = 4
Total number of Box cars = 112
Total number of flat cars = 5
Here we have to apply the concept of combinations
Number of ways of selecting 2 tank car from 5 = [tex]4C_2[/tex]
= 4! / 2!( 4-2) !
= 6
Number of ways of selecting 5 Box cars from 12 = [tex]12C_5[/tex]
= 12! / 5!(12-5)!
= 792
Number of ways of selecting 3 flat cars from 7 = [tex]7C_3[/tex]
= 7! / 3!(7-3)!
= 35
Number of possible ways can a train be made up = 6 × 792 × 35
Multiply the numbers
= 166320
Therefore, the number of possible ways is 166320
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The given question is incomplete, the complete question is :
Freight Train CarsIn a train yard there are 4 tank cars. 12 boxcars, and 7 flatcars. How many ways can a train be made up consisting of 2 tank cars, 5 boxcars, and 3 flatcars?
Explain how you would find the value of x.
Find the value of x.
3x + 1
2x
4x+7
5x-4
x+1
3x-5
As Bin is driving her car, she notices that after 1 hour her gas tank has 7.25 gallons left and after 4 hours of
driving, it has 3,5 gallons of gas left in it.
(3) Represent this information as two coordinate
pairs in the form (1, g), Where A is the
number of hours driven and g is the gallons of Gas left
Bin had 7.25 gallons of gas to start with using the unitary method.
Unitary method is a problem-solving technique that involves finding the value of one unit and using it to calculate the value of other units. In this case, we will use unitary method to find the number of gallons Bin had to start with.
Firstly, we need to find the rate of gas consumption. The slope of the line, which is the change in the gas level over time, gives us this information. Since the slope is -1.25, this means Bin is losing 1.25 gallons of gas per hour.
Next, we need to find the total time Bin has been driving. From the problem, we know that after 1 hour, she had 7.25 gallons left, and after 4 hours, she had 3.5 gallons left. This means that she drove for 3 hours (4-1).
Using the unitary method, we can calculate the total amount of gas Bin had to start with. We know that she lost 1.25 gallons of gas per hour, and she drove for 3 hours. Therefore, she lost a total of 3.75 gallons of gas during the trip.
To find the initial gas level, we need to subtract the amount of gas she lost from the gas level she had at the end of the trip. This gives us:
Initial gas level = Gas level at end of trip + Gas lost during the trip
Initial gas level = 3.5 gallons + 3.75 gallons
Initial gas level = 7.25 gallons
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Complete question:
As Bin is driving her car, she notices that after 1 hour her gas tank has 7.25 gallons left and after 4 hours of driving, it has 3.5 gallons of gas left in it. The rate at which she is LOSING gas is 1.25 gallons....So, the slope is -1.25. How many gallons did she have to START?
a tabular summary of a set of data showing the fraction of the total number of items in several classes is a group of answer choices cumulative relative frequency distribution. frequency distribution. relative frequency distribution. cumulative frequency distribution.
The cumulative relative frequency distribution is a useful tool for summarizing data and making comparisons between classes. It can also be used to make predictions about future data values.
A cumulative relative frequency distribution is a table that shows the cumulative relative frequency of a set of data. A cumulative relative frequency is the sum of all relative frequencies up to a certain point in the data set. For example, if the first three entries in a data set are 20, 30, and 10, the cumulative relative frequency of the first entry would be 0.2, the cumulative relative frequency of the second entry would be 0.5, and the cumulative relative frequency of the third entry would be 1.0.
In a cumulative relative frequency distribution, the data is organized into classes, and each class has a relative frequency associated with it. The relative frequency is the fraction of the total number of items in the class compared to the total number of items in the data set. The cumulative relative frequency is the sum of the relative frequencies of all the classes up to that point.
For example, if there are five classes in a data set, the cumulative relative frequency of the first class would be the relative frequency of the first class. The cumulative relative frequency of the second class would be the sum of the relative frequencies of the first and second classes, and so on.
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I’m so confused about this problem:
1 5/9 ÷ -1/2
Can anyone help me?
(ToT)
Answer: -3.11111112
Step-by-step explanation:
1 and 5/9 as a decimal is 1.555555556
-1/2 as a decimal is -0.5
1.555555556 divided by -0.5 is -3.11111112
The __________________________________ property of addition states that the way addends are grouped does not affect their sum
The Commutative property Associative property Identity property property of addition states that the way addends are grouped does not affect their sum.
The commutative property of addition states that the sum is unaffected by the order of the addends. 2+3=3+3
Changing the order of the addends has no effect on the sum, according to the associative property of addition.
(2+3)+4=2+(3+4)
Identity of addition property: Any number is equal to the sum of 0 00 and that number. For instance 0+5=5
According to the commutative property of addition, altering the order of addends has no impact on the sum. 2+3 = 3+2
as 3 rules are there only
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FIFTEEN 15 POINTS! pls help with functions :)
Answer:
A
Step-by-step explanation:
If you look at the graph it starts at 30 and the next time it lines up on the lines is 3 up and 2 over. Therefore it is 3/2x+30
Help me with this question, I don't know how to solve
The simplified value is [tex]\frac{7a^{8}+12 }{21a^{5}}[/tex].
What is a mathematical expression?
A mathematical expression is a phrase that contains at least two terms or numbers and one action. It's possible to multiply, divide, add, or subtract with this mathematical operation.
The given expression is [tex]\frac{a^{3}}{3}+\frac{4}{7a^{5}}[/tex].
This can be simplified by cross-multiplying and adding.
[tex]\frac{a^{3}}{3}+\frac{4}{7a^{5}}=\frac{7a^{5}*a^{3}+4*3}{3*7a^{5}} \\=\frac{7a^{8}+12}{21a^{5}}[/tex].
Therefore the simplified value of the given expression is :
[tex]\frac{a^{3}}{3}+\frac{4}{7a^{5}}=\frac{7a^{8}+12 }{21a^{5}}[/tex]
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Problem #1 - Luca went
grocery shopping for
some last-minute picnic
supplies. He knows that
the sliced turkey was
$3.50 per 1 1/4-pounds
and coleslaw was $1.35
per 1/2 pound. How
much would it cost him if
he bought 3 pounds of
turkey and 1 1/2 -pounds
of coleslaw?
Problem #2 - Fill in the
Why?
The required it would cost $12.45 to buy 3 pounds of turkey and 1 1/2 pounds of coleslaw.
What are expression models?The expression model is defined as the model of the given situation in the form of an equation using variables and constants.
Here,
To calculate the cost of the turkey, we need to find the price per pound and then multiply it by the number of pounds. The price per pound is,
= $3.50 ÷ (1 1/4 pounds)
= $2.80 per pound
To find the cost of 3 pounds of turkey, we can multiply the price per pound by the number of pounds:
= 3 pounds × $2.80 per pound = $8.40
To find the cost of the coleslaw, we can simply multiply the price per half pound by the number of half pounds,
1 1/2 pounds = 3 half pounds
= 3 half pounds × $1.35 per half pound
= $4.05
Finally, we can add the cost of the turkey and the coleslaw to find the total cost:
$8.40 + $4.05 = $12.45
Therefore, it would cost $12.45 to buy 3 pounds of turkey and 1 1/2 pounds of coleslaw.
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For each ordered pair, determine whether it is a solution to the system of equations. -18x+2y=8 and y=9x+4
For the given system of equations, no solution is possible.
What is the system of equations?One or many equations having the same number of unknowns that can be solved simultaneously are called simultaneous equations. And the simultaneous equation is the system of equations.
Given:
The system of equations,
-18x + 2y = 8 {equation 1}
y = 9x + 4 {equation 2}
Substitute the value of y from equation 2 to equation 1,
we get,
-18x + 18x + 8 = 8
0 = 0
That means, the lines of the equation are parallel to each other.
Therefore, no solution is possible for the system.
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the graph of a line goes through the points (-2, -3) and (2, -1). which linear equation represents this line?
The linear equation of the line which passes through the points (-2, -3) and (2, -1) is:
y + 3 = 0.5 (x + 2)
What is meant by a linear equation?
An equation is said to be linear if the maximum power of the variable is consistently 1. Another name for it is a one-degree equation. A linear equation is a straight line equation.
It is of the form: y = mx + c
where m = slope of the line
c = x-intercept of line.
The linear equation of a line is:
y - y₁ = m ( x - x₁)
Given two points on the line
(x₁ , y₁) = (-2, -3)
(x₂ , y₂) = (2, -1)
m = slope of line = (y₂ - y₁) / (x₂ - x₁) = (-1 - (-3)) / (2 - (-2)) = 2/4 = 1/2
Now substituting this value in the general equation, we can write the equation as:
y - (-3) = 1/2 ( x -(-2))
y + 3 = 0.5 (x + 2)
Therefore the linear equation of the line which passes through the points (-2, -3) and (2, -1) is:
y + 3 = 0.5 (x + 2)
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which of the following shows 87 and 1/2% as a fraction? 7/8, 5/8, -8/75, none of these
Answer:
Step-by-step explanation:
87.5% = 87.5/100 = 875/1000= 7/8
Geometry!!!!! help me
The value of the unknown side length, BC, in given diagram is 28.3 ft
Similar triangles: Calculating unknown side length in a triangleFrom the question, we are to determine the value of the unknown side length in the given diagram
By similar triangles theorem, we can write that
AX/XY = AB/BC
From the given information,
AX = 12ft
XY = 17 ft
AB = AX + XB
= 12 ft + 8 ft
= 20 ft
BC = ?
Then, we can write that
12/17 = 20/BC
Cross multiply
12 × BC = 17 × 20
12 × BC = 340
BC = 340/12
BC = 28.3
Hence, the value of BC is 28.3 ft
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repeat your t-test above, this time using only players who make over $600k. is the difference in average salary between first basemen and all other players still significant?
A t-test is a statistical test used to determine if there is a significant difference between the means of two groups.
In this case, the two groups being compared are first basemen and all other players, and the variable being measured is salary. By performing a t-test, we can determine if there is a significant difference in the average salary between first basemen and all other players.
To perform a t-test, we first calculate the difference in means between the two groups and divide by the standard error of the difference. The standard error takes into account the variability in the sample and the sample size. The result is the t-statistic, which is then compared to a t-distribution with degrees of freedom equal to the sum of the degrees of freedom of the two groups minus 2. The t-distribution gives us the probability of observing a difference as large or larger than the observed difference by chance if the two groups have the same mean. This probability is known as the p-value.
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