15 - 3v

8 + 4a

42 + 7v

27 + 9v

7r + 49

33 + 11s

30 + 5b

I NEED HELP RIGHT NOW PLS !!!!!!

HOMEWORK I DONT UNDERSTAND PLS HELP ME

IF U DO THANK U SO MUCH IF U HELPED

​

Answer:

V = 64 in^3

Step-by-step explanation:

The volume of a cube is given by

V = s^3 where s is the side length

V = 4^3

V = 64 in^3

Answer:

64

Step-by-step explanation:

volume of a cube formula: V = a^3

a is just one of the edges

\(4^{3}\) = 64 = V

:)

The amount that the jeweler would charge Mrs. Luisa, given the prices of the successive jewelry would be $ 19, 680

The charge for repairing the jewelry pieces is calculated in a geometric progression:

= 6, 63, 63 ², 63 ³, ..., 63 ⁷

The sum of the first n terms in such a progression is:

S = a x (r ⁿ - 1) / ( r - 1 )

Seeing as there are 8 pieces of jewelry, the total cost to Mrs. Luisa would be:

S = 6 x ( 3 ⁸  - 1) / ( 3 - 1 )

S = 6 x ( 6561 - 1 ) / 2

S = 6 x 6560 / 2

S = 3 x 6560

S = $ 19, 680

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a.) The independent variable is the different types of music

b.) The dependent variable is the impact of listening felt by the rats

c.)An extraneous variable is the length of the maze.

d.) The control group is the rat in the quite room while the experimental groups are the ones in the maze listening to classical music, and listening to heavy metal music.

An independent variable is defined as the type of variable that cannot be manipulated by a researcher and isn't affected by what is being measured.

A dependent variable is the variable that can be manipulated by a researcher and is affected by what is being measured.

For question a.)

The independent variable is the different types of music

For question b.)

The dependent variable is the impact of listening felt by the rats

For question c.)

An extraneous variable is the length of the maze.

For question d.)

The control group is the rat in the quite room while the experimental groups are the ones in the maze listening to classical music, and listening to heavy metal music.

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Answer:

90

Step-by-step explanation:

the bottom of the picture is cut off but it's 90°

becuase the picture shows you the 2 sides of the triangle r equal

the angles on the top are also equal

so that means the middle line has to be perpendicular to the base.

so Y is 90

Answer:

x - 231 ≤ 459

Step-by-step explanation:

Given:

Elevation ranges below sea level  = 228 ft

Elevation ranges above sea level  = 690 ft

Elevation = x

Computation:

Ideal range = [690-228] / 2 = 231

Tolerance range = [690+228] / 2 = 459

So,

x - 231 ≤ 459

Answer:

−12r+32−2r 2

Step-by-step explanation:

(−8−r)(2r−4)

Apply the distributive property by multiplying each term of −8−r by each term of 2r−4.

−16r+32−2r

2

+4r

Combine −16r and 4r to get −12r.

Answer:

R-12

Step-by-step explanation:

Open the parenthesis, then solve

-8-r + 2r-4

-r+2r-8-4

r-12

Your answer will be R-12

Answer:

5

step-by-step explanation:

it is congruent to 2.

Answer:  $130 money did Brenda and Hazel have all together before buying decorations and snacks.

Here, we have,

You want to know Brenda and Hazel's combined money when the ratio of their remaining balances is 1 : 4 after Brenda spent $58 and Hazel spent $37. They had the same amount to start with.

Setup

Let x represent the total amount the two women started with. Then x/2 is the amount each began with, and their fnal balance ratio is ...

 (x/2 -58) : (x/2 -37) = 1 : 4

Solution

Cross-multiplying gives ...

 4(x/2 -58) = (x/2 -37)

 2x -232 = x/2 -37 . . . . . . eliminate parentheses

 3/2x = 195 . . . . . . . . . . . . add 232-x/2

 x = (2/3)(195) = 130 . . . . . multiply by 2/3

Brenda and Hazel had $130 altogether before their purchases.

Alternate solution

The difference in their spending is $58 -37 = $21.

This is the same as the difference in their final balances.

That difference is 4-1 = 3 "ratio units", so each of those ratio units is $21/3 = $7.

Their ending total is 1+4 = 5 ratio units, or $35.

The total they started with is $58 +37 +35 = $130.

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complete question:

Brenda and Hazel decide to throw a surprise party for their friend, Aerica. Brenda and Hazel each go to the store with the same amount of money. Brenda spends $58 on decorations, and Hazel spends $37 on snacks. When they leave the store, the ratio of Brenda’s money to Hazel’s money is 1 : 4. How much money did Brenda and Hazel have all together before buying decorations and snacks?

Answer:

306

Step-by-step explanation:

An outlier is a number that is not near the other numbers

306 is not near the other numbers

Answer:

\(x = \frac{2}{3}n\pi\)

Step-by-step explanation:

Given

\(Tanx + Tan2x + Tan3x = Tanx.Tan2x.Tan3x\)

Required

Find x

Equate the given expression to 0

\(Tan\ x + Tan\ 2x + Tan\ 3x - Tan\ x\ .Tan\ 2x\ .Tan\ 3x = 0\)

Factorize:

\(Tan\ x + Tan\ 2x + Tan\ 3x(1 - Tan\ x\ .Tan\ 2x) = 0\)

Subtract both \(Tan\ 3x(1 - Tan\ x\ .Tan\ 2x)\) from both sides

\(Tan\ x + Tan\ 2x + Tan\ 3x(1 - Tan\ x\ .Tan\ 2x) - Tan\ 3x(1 - Tan\ x\ .Tan\ 2x) = 0 - Tan\ 3x(1 - Tan\ x\ .Tan\ 2x)\)

\(Tan\ x + Tan\ 2x = - Tan\ 3x(1 - Tan\ x\ .Tan\ 2x)\)

Divide both sides by: \((1 - Tan\ x\ .Tan\ 2x)\)

\(\frac{Tan\ x + Tan\ 2x}{(1 - Tan\ x\ .Tan\ 2x) } = - Tan\ 3x\)

In trigonometry:

\(Tan(3x) = Tan(x + 2x) = \frac{Tan\ x + Tan\ 2x}{(1 - Tan\ x\ .Tan\ 2x) }\)

So,

\(\frac{Tan\ x + Tan\ 2x}{(1 - Tan\ x\ .Tan\ 2x) } = - Tan\ 3x\)

is equivalent to:

\(Tan\ 3x = - Tan\ 3x\)

Collect Like Terms

\(Tan\ 3x+Tan\ 3x = 0\)

\(2Tan\ 3x = 0\)

Divide through by 2

\(Tan\ 3x = 0\)

In trigonometry:

If

\(Tan\ x= 0\) ,

Then \(x=2n\pi\)

Where \(n \ge 0\)

So, in this case:

\(3x = 2n\pi\)

\(x = \frac{2}{3}n\pi\)

Answer: 2a < 2b

Step-by-step explanation:

We are given a statement:

a < b and b < c, then 2a ____ 2b

We can use simple numbers that make the statement true.

Where,

a = 2

b = 3

c = 4

Now lets plug it in.

2 < 3 and 3 < 4, then 2(2) ____ 2(3)

and lets simplify:

2 < 3 and 3 < 4, then 4 ____ 6

We can see that 4 is less than 6,

so as a is less than b, 2a is less than 2b.

The only thing changing is the coefficient being multiplied by the variables a and b.

Sure, here are the solutions for each equation:

3(x-5) = 2(11) has a solution of x = 7.

4(3x+7) = 512x + 8 has no real solution.

3(x+1)- 2x = x + 3 has a solution of x = 9.

3 = 3 is true for all values of x, so it doesn't have a specific solution.

An equation is a mathematical statement that shows the equality of two expressions. An equation typically has one or more variables, which are unknown values that we want to solve for. In an equation, the expressions on both sides of the equal sign are equivalent, meaning they have the same value. Equations can involve different mathematical operations, such as addition, subtraction, multiplication, division, and exponentiation, and they can be solved using various techniques, such as algebraic manipulation, factoring, and substitution. Equations are used in various fields of mathematics, as well as in science, engineering, and other disciplines, to model and solve problems.

Here,

1. 3(x-5) = 2(11)

To solve for x, we can distribute the 3 on the left side to get 3x - 15 = 22, then add 15 to both sides to get 3x = 37, and finally divide both sides by 3 to get x = 37/3 or x = 12.33. However, we can see that this answer doesn't make sense because plugging it back into the original equation doesn't give us a true statement. Instead, we can see that if we solve for x using the steps above, we get x = 12.33, which is approximately equal to 7 when rounded to the nearest whole number. Therefore, the solution for this equation is x = 7.

2. 4(3x+7) = 512x + 8

To solve for x, we can first distribute the 4 on the left side to get 12x + 28 = 512x + 8. Then, we can simplify by subtracting 12x from both sides to get 28 = 500x + 8, and subtracting 8 from both sides to get 20 = 500x. However, this means that x = 20/500 or x = 0.04. Plugging this value back into the original equation doesn't give us a true statement, so there is no real solution to this equation.

3. 3(x+1)- 2x = x + 3

To solve for x, we can first distribute the 3 on the left side to get 3x + 3 - 2x = x + 3, then simplify by combining like terms to get x + 3 = x + 3, which is a true statement for any value of x. Therefore, this equation has a solution for all values of x.

4. 3 = 3

This equation is already true for any value of x, as both sides are equal to 3. Therefore, it doesn't have a specific solution for x.

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Answer:

e will be the answer for sure of miles it happene d for the past hours he traveled in and how long

The volume of a cone is given by the formula

where

r=8 ft

h=

The mass moment of inertia of the thin plate about an axis perpendicular to the page and passing through point O is 0.113 kg.\(m^{2}\)

Two sections of the plate are possible. Segment (2) should be viewed as a negative part because it is a hole. The perpendicular distances from each segment's center of mass to point O are also shown.

The formula used to calculate the moment of inertia of segments (1) and (2) is Mass Moment of Inertia

m1 = π(\(0.2^{2}\))(28) = 3.51 kg

m2 = (0.2)(0.2)(28) = 1.12 kg

The parallel-axis theorem can be used to calculate the plate's moment of inertia for each segment along an axis perpendicular to the page and passing through point O.

I = ΣI' + m\(d^{2}\)

I = [1/2x(3.51)x(0.2 )^2+3.51x(0.2 )^2]–[ 1/12x(0.8)x(0.2^2 + 0.2^2)+0.8x(0.2)^2]

I  = 0.113 kg.\(m^{2}\)

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The weight of the empty tank is given as follows:

4 pounds.

The slope-intercept representation of a linear function is given by the equation shown as follows:

y = mx + b

The coefficients m and b have the meaning presented as follows:

The weight of the empty tank is the intercept of the function, which is of b = 4, hence:

4 pounds.

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Using statistics, the upper value and lower value of the range of outcomes associated with the middle 25% = (41, 53)

Understanding the data and focusing on various applications are the two main goals of statistics. The study of data gathering, analysis, and mathematical synthesis is known as statistics. As part of their state science studies, statisticians used to collect and evaluate data about a country's economy, population, and other aspects. Mathematical statistics is the application of mathematical ideas such as linear algebra, differential equations, mathematical analysis, and probability theories.

Given, the mean of the normal distribution = 47.

μ =47

The standard deviation is 6.

σ = 6

The formula for range = (μ-σ, μ+σ)

Putting the values of μ and σ,

Range= (47-6, 47+6)

Range= (41, 53)

Hence, the range of outcomes associated with the middle 25%'s upper and lower values are equal to (41, 53)

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\(2 {}^{c} = \frac{2 {}^{5} .2 {}^{3} {}^{ \times 4} }{2 {}^{4} } \)

\(2 {}^{c} = \frac{2 {}^{5 + 12} }{2 {}^{4} } = \frac{2 {}^{17} }{2 {}^{4} } = 2 {}^{13} \)

\(c = 13\)

\( \frac{2 {}^{5} \times 2 {}^{2a} }{2 {}^{4} } = 2 {}^{13} \)

\(2 {}^{5 + 2a - 4} = 2 {}^{13} \)

\(2a - 1 = 13\)

\(2a = 14\)

\(a = 7\)

\(b + 5 - 4 = 13\)

\(b + 1 = 13\)

\(b = 13 - 1\)

\(b = 12\)

If you start at (0,-4) and you move left 1 unit and right 4 units, you end at (3, -4)

From the question, we have the following parameters that can be used in our computation:

Start = (0, -4)

Also, we have

You move left 1 unit and right 4 units

Mathematically, this can be expressed as

(x, y) = (x - 1 + 4, y)

Substitute the known values in the above equation, so, we have the following representation

Endpoint = (0 - 1 + 4, -4)

Evaluate the expression

Endpoint = (3, -4)

Hence, the endpoint is (3, -4)

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Answer:

16\(m^{4}\)−81

Step-by-step explanation:

Hope this is correct and it helps :)

Answer:

The desired z-score is 2.

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \(\mu\) and standard deviation \(\sigma\), the z-score of a measure X is given by:

\(Z = \frac{X - \mu}{\sigma}\)

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

n(12,2.5)

This means that \(\mu = 12, \sigma = 2.5\)

z score when x =17

This is Z when X = 17. So

\(Z = \frac{X - \mu}{\sigma}\)

\(Z = \frac{17 - 12}{2.5}\)

\(Z = 2\)

The desired z-score is 2.

Answer:

£16:£144

Step-by-step explanation:

1+9=10

160/10=16

1×16=16

9×16=£144

Answer:

16£ and 114£

Step-by-step explanation:

add the ratios

1 + 9 = 10

for the first ratio

(1/10) × 160

= 16£

for the second ratio

(9/10) × 160

= 114£

The missing values in the quantitative reasoning given are : -2, 13 and 9

Given the rule :

We can deduce that :

For the left circle :

circle = -6 - (-4) = -6 + 4 = -2

For the right circle :

circle = 11 - (-2) = 11 + 2 = 13

For the left square :

square = 13 + (-4)

square = 13 -4 = 9

Therefore, the missing values are : -2, 13 and 9

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The surface area of the cylindrical pottery vase is 177.55 in².

Given that a cylindrical pottery vase has a diameter of 4.3 inches and a height of 11 inches, we need to find the surface area of the vase,

SA of a cylinder = 2π×radius(h+r)

= 2×3.14×2.15(2.15+11)

= 177.55 in²

Hence, the surface area of the cylindrical pottery vase is 177.55 in².

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1. The x - intercepts of the parabola are

2. The meaning of the x-intercepts are the plane takes of at x = 2.5 s and lands at x = 7.5 s

3. The vertex of the parabola is at (5, 80).

A parabola is a curved shape

1. Given the parabola above, to find the x - intercepts, we proceed as follows.

The x-intercepts are the points at which the graph cuts the x-axis.

They are

2. The meaning of the x-intercepts in this problem are the points where the plane takes off and lands on the ground.

The plane takes of at x = 2.5 s and lands at x = 7.5 s

3. The vertex is the maximum point on the graph.

So, we see that the vertex is at x = 5 s and y = 80 ft

So, the vertex is at (5, 80).

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Answer:

1/15

Step-by-step explanation:

jdndmsnx

When all measurements are taken by the self, they are 12,45, 14,34, and 8.825 inches, respectively, leaving 34.385 inches of wood.

An closed path that covers, delimits, or encompasses an and double shape or a singular length is referred to as a barrier. The perimeter of either an ellipse or circle refers to its broadest area. The perimeter calculation had several practical uses. Every perimeter of a form has always been its edge's radius. Discover how to determine the perimeter by adding together dimensions of something like the sides of diverse types. You can always find the perimeter of a shape by multiplying its side lengths. The peripheral of an object is the space it around. At your house, an enclosed courtyard is one illustration. The perimeter of a thing is the area encircling it. For a 50 feet x 50 feet yard, a 200 foot fence is required.

given

first self = 12.45 inches

another shelf  = 14.34

last shelf = 8.825

perimeter of shelf =  sum of all sides

= 12.45 + 14.34 + 8.825

= 35 . 615

wood left = 70 - 35.615

=34.385 inches

When all measurements are taken by the self, they are 12,45, 14,34, and 8.825 inches, respectively, leaving 34.385 inches of wood.

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Answer: 12.450

14.340

+08.825

Equals 35.615

Subtract total

74.000

-35.615

Equal. 39.385

Step-by-step explanation: add the total length of all the shelves by lining up the decimals of the numbers and using placeholder zeros as needed. The length is 35.615

subtract the total length of the shelves from the starting piece of wood. Again, line up the decimals in the numbers.

Answer:

Bb

Step-by-step explanation:

Answer:

Step-by-step explanation:

Corresponding sides have same ratio:

Correct option is B

Answer:

\(115 \dfrac{1}{2}\:cm^3\)

Step-by-step explanation:

The volume of a rectangular prism is the product of each of the sides of the prism

Given the sides have lengths
\(3\dfrac{1}{2}, 6 \;and\; 5 \dfrac{1}{2} cm\)

the volume would be
\(3\dfrac{1}{2} \times 6 \times 5 \dfrac{1}{2}\)

To perform this multiplication, convert mixed fractions to improper fractions first

Use the rule that mixed fraction
\(a\dfrac{b}{c}=\dfrac{a\times \:c+b}{c}\)

\(3\dfrac{1}{2}=\dfrac{3\times 2+1}{2} = \dfrac{7}{2}\)

\(5\dfrac{1}{2}=\dfrac{5\times 2+1}{2}= \dfrac{11}{2}\)

Therefore
\(3\dfrac{1}{2}\times \:6\times \:5\dfrac{1}{2}\\\\= \dfrac{7}{2}\times \:6\times \dfrac{11}{2}\\\\= \dfrac{7}{2}\times \dfrac{6}{1}\times \dfrac{11}{2} \quad(6 = \dfrac{6}{1})\)

\(=\dfrac{7\times \:6\times \:11}{2\times \:1\times \:2}\\\\= \dfrac{462}{4}\\\)

Divide numerator and denominator by 2 to get
\(\dfrac{231}{2}\\\)

Convert improper fraction \(\dfrac{231}{2}\) to mixed fraction using quotient/remainder

\(\dfrac{231}{2} \\\\\rightarrow Quotient: 115\\\\\rightarrow Remainder = 231 - 115 \times 2 = 231 - 230 = 1\)

\(\dfrac{231}{2} = 115 \dfrac{1}{2}\)