Answer:
2
Step-by-step explanation:
x+1 +3x-2=2 group them in like terms
3x-x+2+1=2 then subtract the variable and add the number
2x=3-2 arrange them
2x=1 divide both side by 2
therefore x=2
Choose the vocabulary term that correctly completes each sentence.
An ordered list of terms is a __________.
An ordered list of terms is a Mathematical Sequences.
In mathematics, informally speaking, a sequence is an ordered list of objects (or events). Like a set, it contains members (also called elements, or terms). The number of ordered elements (possibly infinite) is called the length of the sequence. Unlike a set, order matters, and exactly the same elements can appear multiple times at different positions in the sequence.
Most precisely, a sequence can be defined as a function whose domain is a countable totally ordered set, such as the natural numbers. For example, (M, A, R, Y) is a sequence of letters with the letter 'M' first and 'Y' last. This sequence differs from (A, R, M, Y). Also, the sequence (1, 1, 2, 3, 5, 8), which contains the number 1 at two different positions, is a valid sequence. Sequences can be finite, as in this example, or infinite, such as the sequence of all even positive integers (2, 4, 6,...). Finite sequences are sometimes known as strings or words and infinite sequences as streams. The empty sequence ( ) is included in most notions of sequence, but may be excluded depending on the context.
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which best describes how to solve the equation below?
26x = 74
A. divide both sides by 74
B. divide both sides by 26
C. Multiply both sides by 26
D. multiply both sides by 74
Answer:
B. Divide both sides by 26
Explanation:
When doing a one step equation you basically want to get the x alone. To do that you need to divide 26x by 26.
26x = 74
26 26
x = 2.8
Determine whether each set of numbers can be the measures of the sides of a triangle. If so, classify the triangle as acute, obtuse, or right. Justify your answer.
4.5,20,20.5
Yes, the given set of numbers can be the measures of the sides of a triangle. The triangle is right-angled.
By the triangle inequality theorem, the sum of the lengths of any two sides should be greater than the length of the third side.
4.5 + 20 > 20.5
20 + 20.5 > 4.5
20.5 + 4.5 > 20
Hence, these set of numbers can be the measures of the sides of a triangle.
According to the Pythagorean Inequality Theorem, a triangle whose sides measure a, b, and c where c is the largest, the triangle can be characterized as:
acute if [tex]a^{2} + b^{2} < c^{2}[/tex]
obtuse if [tex]a^{2} + b^{2} > c^{2}[/tex]
right if [tex]a^{2} + b^{2} = c^{2}[/tex]
∴The longest side is 20.5.
Hence, a = 4.5, b = 20 and c = 20.5.
Consider [tex]a^{2} + b^{2}[/tex] :
= [tex]4.5^{2} + 20^{2}[/tex]
= 420.25.
Now consider [tex]c^{2}[/tex] :
= [tex]20.5^{2}[/tex]
=420.25.
Thus, [tex]a^{2} + b^{2} = c^{2}[/tex]
Hence, the triangle is right-angled.
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Circle X has a radius of 1/3 meter. Circle Y has a radius of 1 meter. What is the ratio of the area of circle X to the area of circle Y?
The ratio of the area of circle X to the area of circle Y is 0. 11
How to determine the ratio
The formula for area of a circle is expressed as;
Area = πr²
Where; 'r' is the radius
For circle X, radius = 1/ 3 meter
Let's find the area
Area = 3. 142 × (1/3)²
Area = 3. 142 × 1/ 9
Area = 0. 35 square meters
For circle Y, radius = 1
Area = 3. 142 × 1²
Area = 3. 142 × 1
Area = 3. 142 square meters
Ratio of circle X to circle Y
= 0.35/ 3. 142
= 0. 11
Thus, the ratio of the area of circle X to the area of circle Y is 0. 11
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24) Samit invests $1800 at a rate of 4.5% per year simple interest.
Work out the value of his investment at the end of 4 years.
Answer: 2124 dollars
Step-by-step explanation:
4.5% of 1800 is 81. As it is simple interest and not compound, it does not change each year. Therefore, 81 x 4 is 324. 1800+324 = 2124 dollars
5) La Varianza es la raíz cuadrada de la desviación típica
O Falso
O Verdadero
Answer:
la correcta es verdadero
Solve each system by elimination.
x +2y=10 , x+y = 6
By elimination, the solution of the system of equations, x + 2y = 10 and x + y = 6, is (2 , 4).
A system of equations is a set of two or more equations which includes common variables. To solve system of equations, we must find the value of the unknown variables used in the equations that must satisfy all the equations.
There are three methods that can be used to solve system of equations.
1. Elimination
2. Substitution
3. Graphing
Using the elimination method, given two equations in x and y, a variable should be eliminated by adding/subtracting the two equations.
Subtracting the two equations will eliminate the variable x.
x + 2y = 10 (equation 1)
x + y = 6 (equation 2)
0x + y = 4
y = 4
Substitute the value of y to any of the two equation and solve for x.
x + 2y = 10 (equation 1)
x + 2(4) = 10
x = 10 - 8
x = 2
Hence, the solution of the system of equations is (2 , 4).
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Darius correctly answered 51 questions on his Pre-Algebra 2 class. He received a score of 75%. How many questions were on the quiz?
Answer:
Step-by-step explanation:
Determine which property is being used below. 18x1
Multiplicative Identity Property
Step-by-step explanation:Using math properties like the multiplicative identity property we can solve different expressions and equations.
Definition of Multiplicative Identity Property
The multiplicative identity property states that any number multiplied by 1 equals itself. This means that 18 x 1 = 18. Of course, since this is a property we can apply this idea to any equation.
-56 x 1 = -561 x π = π∞ x 1 = ∞All of the statements above are true because of the multiplicative identity property.
Uses of the Multiplicative Identity Property
While being able to do simple operations with this property is helpful, there are other uses as well. One of the most prominent uses is finding a great common factor. When adding or subtraction fractions, you must have a GCF. We can use the multiplicative identity property to do this.
Take the expression
[tex]\displaystyle\frac{5}{6}-\frac{2}{3}[/tex]To solve this we must multiply [tex]\frac{2}{3}[/tex] by [tex]\frac{2}{2}[/tex]. The multiplicative identity property tells us that since 2/2 = 1, this will not affect the value of the expression (remember that anything times 1 is still equal to itself).
[tex]\displaystyle\frac{2}{3}*\frac{2}{2} =\frac{4}{6}[/tex]Then, we can solve the expression.
[tex]\displaystyle\frac{5}{6} -\frac{4}{6} =\frac{1}{6}[/tex]
The formula for pressure under water is P=rhogh , where \rho is the density of water, g is gravity, and h is the height of the water. Given the water pressure, prove that you can calculate the height of the water using h=P/rhog} .
Pressure is defined as the force applied perpendicular to an object's surface per unit area across which that force is dispersed. The proof for calculating water pressure can be given as shown below.
What is Pressure?Pressure is defined as the force applied perpendicular to an object's surface per unit area across which that force is dispersed. Gauge pressure is the pressure in relation to the surrounding atmosphere. Pressure is expressed using a variety of units.
The formula given for pressure under water is P=ρgh, where ρ is the density of water, g is gravity, and h is the height of the water.
Now, if the fomula is solved for h it can be written as,
P=ρgh
Divide both the sides of the equation by ρg, therefore, we can write,
P/ρg = ρgh/ρg
h = P/ρg
Now, the value of ρ for water and g is 997 kg/m³ and 9.81 m/sec², respectively. Therefore, we can write,
h = P/(ρg)
h = P/(997kg/m³ × 9.81 m/sec²)
Now, just with the pressure known we can calculate the height of the water column.
Hence, proved.
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The circumference
of the circle shown above
is 108. The length of the minor arc AB is a pi. What is the value of a
Answer:
Thus, the length of the arc AB will be 5/18 of the circumference of the circle, which equals 2πr, according to the formula for circumference. length of arc AB = (5/18)(2πr) = (5/18)(2π(18)) = 10π. Thus, the length of arc AB is 10π.
Step-by-step explanation:
Write an explicit formula for each sequence. 2,4,8,16, . . . .
The explicit formula for the given geometric sequence is: [tex]a_n=2^n[/tex].
What is a geometric progression?A geometric progression, sometimes referred to as a geometric sequence in mathematics, is a series of non-zero numbers where each term following the first is obtained by multiplying the preceding one by a constant, non-zero value known as the common ratio.Now, Given sequence: 2, 4, 8, 16, ...
=> 2¹, 2², 2³, 2⁴, ....
Thus, the explicit formula for this geometric sequence will be given by: [tex]a_n=2^n[/tex].
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What is the value of 13x if x = −7?
−20
−71
−91
−137
-2(x+4)+3x=x-8solve the equation
Step-by-step explanation:
-2(x+4)=-3x+x-8
Movemos todos los términos a la izquierda:
-2(x+4)-(-3x+x-8)=0
Sumamos todos los números, y todos los variables
-2(x+4)-(-2x-8)=0
Multiplicamos paréntesis
-2x-(-2x-8)-8=0 Eliminamos
paréntesis
-2x+2x+8-8=0
Sumamos todos los numeros juntos, y todas las variables
=0
x=0/1
x=0
Consider y - 8 = - x a.
Complete the table for the equation.
X y
0 ?
1 ?
2 ?
Answer:
(0, 8)
(1, 7)
(2, 6)
(3, 5)
(4, 4)
(5, 2)
(6, 1)
Step-by-step explanation:
y - 8 = -x
+8 +8
y = -x + 8
Slope: -1
8(*)
7 - *
6 - *
5 - *
4 - *
3 - *
2 -
1 -
----|-----|-----|---|----|---|--|----|-
0 1 2 3 4 5
I hope this helps!
Find the x - and y -intercepts of each line.
y=6x
The equation of the line y = 6x has 0 and 0 as its x- and y-intercept, respectively.
The equation of a line is an equation containing variable(s) and constant(s) and can be expressed in three different forms: standard form, slope-intercept form, and point-slope form.
The x-intercept of a line is the value of x when y = 0 while the y-intercept of a line is the value of y when x = 0.
For an equation written in standard form ax + by = c, the x- and y-intercept is as follows:
x-intercept = c/a
y-intercept = c/b
If the equation of the line is y = 6x, then its x- and y-intercept is as follows:
x-intercept = c/a = 0/6 = 0
y-intercept = c/b = 0/1 = 0
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Which is the ratio of the number of months that begin with the letter J to the total number of months in a year?
Answer:1:4
Step-by-step explanation:there are 3 months with the letter j and 12 months so 1:4
Answer:
Ratio of the number of months that begin with the letter J to the total number of months in a year is:
1:4
Step-by-step explanation:
Total number of months in a year=12
Months starting with J are:
January June July
Total months starting with J=3
Ratio= 3:12
=1:4
Hence, ratio of the number of months that begin with the letter J to the total number of months in a year is:
1:4
Explain why...
x2 + 7x + 8
does not factorise
Step-by-step explanation:
because you need 2 numbers that
(+)=7
and
(x)=8
no 2 whole numbers work
it will have to be decimals
so you can't factorise
so you have to use the quadratic formula
hope this helps :)
Answer:
Step-by-step explanation:
if a quadratic of this form can be factorised the factors are
(x + a)(x + b).
In this case a*b would be = + 8 and a + b would be + 7.
There are no integer values which will give these 2 results so x^2 + 7x + 8 cannot be factorised.
An example of a quadratic that can be factories is x^2 + 8x + 7,
because ab = 7 *1 and a + b = 7 + 1 = 8 so the factors are:
(x + 1)(x + 7).
m²+2m-24
Factoring trinomials
Step-by-step explanation:
=
[tex](m + 6)(m - 4)[/tex]
HOPE THIS HELPS
Katy’s favorite rides at the amusement park are the roller coaster and water slide. The wait time for the roller coaster is 25 minutes and the wait time for the water slide is 10 minutes. If she went on 12 rides total and waited three hours in line, how many times did she go on each ride?
Katty rode the roller coaster four times after riding the slide eight times.
What number times did she go on each ride?Let R be the number of times she rode the roller coaster
Let S be the number of slides
The following mathematical equation can be created using the information provided:
R + S = 12. ........(i)
25R + 10S = 180 .......(ii)
From equation i, R = 12 - S.
Therefore, 25(12 - s) + 10s = 180
300 - 25s + 10s = 180
300 - 15s = 180
15s = 300 - 180
15s = 120
S = 120/15
S = 8 ,
Therefore R = 12 - S = 12 - 8 = 4
Katty rode the roller coaster four times after riding the slide eight times.
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one half a number is 17 more than one third of that number.what is the number?
Answer:
102
Step-by-step explanation:
Let x equal the unknown number
x/2 = 17 + x/3
3x = 102 + 2x
x = 102
The diagram below shows the dimensions of a pool in a waterpark. Point "O" shown in the diagram is the center of the circular portion of the pool. If a cover is needed for the pool, what is the area of the cover? (Assume pi = 3.14)
Answer:
10,168 sq m
Step-by-step explanation:
The are of the cover is
the area of the circular portion of the pool + area of square portion - area common to both circular and square portions
The common portion is 1/4the the area of the circle
The radius of the circular portion = 80-40 = 40m
Area of circular portion = πr² = π (40)³ = 1600π sq m
1/4 this is 160/4 = 400 sq m
Area of square = 80² = 6400 sq m
Total area = 1600π + 6400 - 400π = 1200π + 6400 = 1200 x 3.14 + 6400
= 10,168 sq m
Answer:
hihihihi
Step-by-step explanation:
1. Evaluate: 3x³- 2x² + 7y for x = -3 and y = -7.
A -148
B 14
C 112
D -112
Answer:
A. -148
Step-by-step explanation:
3x³ - 2x² + 7y
3(-3)³ - 2(-3)² + 7(-7)
3(-27) - 2(9) - 49
-81 - 18 - 49
-148
I hope this helps!
Fwam took a taxi from his house to the airport. The taxi company charged a pick-up fee of $3.80 plus $2.25 per mile. The total fare was $33.05, not including the tip.
The linear equation that represents this situation is given by 3.80+2.25m=33.05. the number of miles travelled is approximately 13.89 miles.
The equation for a linear equation in one variable is written as ax+b = 0, where a and b are two integers, and x is a variable. This equation has only one solution.
Here it is given that the total fare is $33.05
The base fee for the cab is $3.80
Cost per mile is $2.25
Let the distance from Fwam's house and airport be m miles.
Therefore total cost for m miles=2.25m
Total Cost for the cab ride= 3.80+2.25m
But the total cost is $33.05
Hence:
3.80+2.25m=35.05
or, 2.25m=31.25
or, m=13.88888
or, m≈13.89 miles
Hence the distance from the house to the airport is approximately 13.89 miles , which can be calculated from the linear equation: 3.80+2.25m=35.05.
Disclaimer: the complete question is :
Fwam took a taxi from his house to the airport. The taxi company charged a pick-up fee of $3.80 plus $2.25 per mile. The total fare was $33.05, not including the tip. Write and solve an linear equation which can be used to determine m, the number of miles in the taxi ride.
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adam can rent an apartment in the city and walk to work for $615 per month. He can rent an apartment in the suburbs for $500 per month and take the train to work for $5 per day. How many days will he have to work per month to make either choice equal financially?
The 7 days will he have to work per month to make either choice equal financially.
What is arithmetic?Arithmetic is the branch of mathematics that deals with the study of numbers using various operations on them. Basic operations of math are addition, subtraction, multiplication and division. These operations are denoted by the given symbols.
Given:
Adam can rent an apartment in the city and walk to work for $615 per month.
He can rent for $500 per month and take the train to work for $5 per day.
According to given question we have
Total rent =$615 per month.
Rent an apartment in the suburbs = $500 per month
train to work= $5 per day
train to work in a month=$5*30= $150 per month
So, total Rent an apartment in the suburbs
=$500 per month+$150 per month
=$650 per month
Difference
=$650 per month- $615 per month.
=$ 35 per month
$5day==$ 35 month
1 day= $ 35 /5 = $ 7 per month
To work per month to make either choice equal financially in 7 days.
Therefore, the 7 days will he have to work per month to make either choice equal financially.
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Suppose J is between H and K. use the segment addition postulate to solve for x. then find the length of the segment. HJ = 4x + 9, JK = 3x + 3, HK = 33
As we are told that J is between H and K on line segment HK so HJ and JK becomes two different line segments on the same line segment HK
Using the segment addition postulate and the given values of line segments HJ, JK & HK, we first need to find out the value x first
As we know HJ + JK= HK
4x+9 + 3x+3 = 33
7x +12 = 33
7x= 33-12
7x=21
x= 21/7
x= 3
Hence the values of
Line segment HJ = 4x + 9 = 4× 3+ 9=21
Line segment HJ = 3x + 3 = 3× 3+ 3=12
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There were 323232 volunteers to donate blood. Unfortunately, nnn of the volunteers did not meet the health requirements, so they couldn't donate. The rest of the volunteers donated 470470470 milliliters each.
How many milliliters of blood did the volunteers donate?
Write your answer as an expression.
Answer:
The answer is 470(32-n).
Step-by-step explanation:
Given:
There were 32 volunteers to donate blood. Unfortunately, n of the volunteers did not meet the health requirements, so they couldn't donate. The rest of the volunteers donated 470 milliliters each.
Now, to find milliliters of blood the volunteers donate.
Total volunteers = 32.
The number of volunteers couldn't donate = n
The rest of volunteers who donated = 32 - n
Milliliters of blood the rest of each volunteers donated = 470 milliliters.
Now, to get the milliliters of blood the volunteers donate, we multiply the number of rest of volunteers who donated blood by the milliliters of blood they donated: 470(32 - n)
Therefore, the answer is 470(32-n).
Dalvin runs a farm stand that sells strawberries and
blueberries. Each pound of strawberries sells for $2
and each pound of blueberries sells for $3.50. Dalvin
sold twice as many pounds of blueberries as
pounds of strawberries and he made $225
altogether. Write a system of equations that could be
used to determine the number of pounds of
strawberries sold and the number of pounds of
blueberries sold. Define the variables that you use to
write the system.find the system of equation.
2x + 3.50y = 225
To make $225, Dalvin had to sell 25 pounds strawberries and 50 pounds of blueberries.Given that:
Dalvin has a farm stand where strawberries and blueberries are for sale.Blueberries cost $3.50 per pound, while strawberries cost $2 per pound.Dalvin made $225 total by selling twice as many pounds of blueberries as strawberries.To find:
Write an system of equation that might be utilized to calculate the quantity of strawberries and blueberries sold in pounds.Calculate the amount of blueberries and strawberries that were sold in pounds.So, according the question,
Let's assume Delvin sold x pound of strawberries and y pound of blueberries to make $225.
From question,
if, 1 pound of strawberries = $2
So, x pound of strawberries = $2 × x = $2x.
Similarly,
if, 1 pound of blueberries = $3.50
So, y pound of blueberries = $3.50 × y = $3.50y.
Now, we can say that,
x pound of strawberries + y pound of blueberries = $225.
2x + 3.50y = 225 -------------(1)
Equation (1) is the system of equation of the question.
In comparison to strawberries, Dalvin sold twice as many pounds of blueberries.
So,
y = 2x -----------(2)
Now, putting the value of y from eq(2) in the system of equation of the question.
So, we will we get
2x + 3.50y = 225 -------------(1)
2x + 3.50 × 2x = 225
2x + 7x = 225
9x = 225
x = 225/9
x = 25
Now, putting the value of x in eq(2)
So, we will we get
y = 2x -----------(2)
y = 2 × 25
y = 50
Answer:
The system of equation is2x + 3.50y = 225
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Compare and contrast the arithmetic and geometric means of two numbers. When will the two means be equal? Justify your reasoning.
Arithmetic mean and geometric mean of a and b are equal when a = b
Arithmetic mean
Arithmetic mean of two numbers is their sum divided by 2. Generally, arithmetic mean is the sum of the values divided by the total value. It gives the average of two or numbers. It is accurate when the data values are not much skewed.
For two numbers a and b, arithmetic mean = a + b /2
Geometric mean
Geometric mean of two numbers is the square root of its product. It is also used for the calculation of averages. For more than two numbers, the geometric mean is the 1/n th power of the product of the numbers. The skewness of the data values does not affect the accuracy in calculating the geometric mean.
For two numbers a and b, geometric mean = [tex]\sqrt{ab}[/tex]
Always arithmetic mean is larger than the geometric mean.
Arithmetic mean = Geometric mean
⇒ (a+b)/2 = [tex]\sqrt{ab}[/tex]
⇒ a+b = 2 [tex]\sqrt{ab}[/tex]
On squaring,
⇒ [tex]a^2 +2ab+b^2[/tex] = 4ab
⇒ [tex]a^2 -2ab+b^2[/tex] = 0
⇒ [tex](a-b)^2[/tex] = 0
⇒ a -b = 0
⇒ a = b
Arithmetic mean is equal to the geometric mean if the two numbers are equal.
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Given g(x) = 3x - 1, find g(2).
The value of the algebraic expression is a 5.
According to the statement
We have to find that the value of the algebraic expression.
So, For this purpose, we know that the
Algebraic expression is an expression obtained by a finite number of the fundamental operations of algebra upon symbols representing numbers.
From the given information:
The function is a
g(x) = 3x - 1
Then
we have to put the value of the x is a 2 to find the value of the g(2) in the expression.
Then
g(x) = 3x - 1
g(2) = 3(2) - 1
g(2) = 5.
The value becomes 5.
So, The value of the algebraic expression is a 5.
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