Use elimination to find the solution to the system of equations.

Division and subtraction.

Associative property does not work for Subtraction and Division.

The associative property states that after grouping the expressions in different ways the outcome will not change.

(a + b) + c = a +(b + c)

So associative property is applicable for addition.

( a X b) X c = a X ( b X c) = abc

So associative property is applicable for multiplication

(a ÷ b) ÷ c ≠ a ÷ (b ÷ c)

So, the associative property is not applicable for  Division

(a-b) - c ≠ a - (b -c)

So,  the associative property is not applicable for Subtraction

So, we can say associative property does not work for Subtraction and division.

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Answer:

Step-by-step explanation:

"A mathematical model is a description of a system using mathematical concepts and language. The process of developing a mathematical model is termed mathematical modeling. Mathematical models are used in the natural sciences (such as physics, biology, earth science, chemistry) and engineering disciplines (such as computer science, electrical engineering), as well as in the social sciences (such as economics, psychology, sociology, political science).

A model may help to explain a system and to study the effects of different components, and to make predictions about behavior."

Answer:

y = -4

Step-by-step explanation:

Assuming the problem is [tex]8^{2y+4}=16^{y+1}[/tex], it would be nice if we could convert both sides of this equation to the same base; that way, we could compare the exponents directly in an equation of their own. Fortunately, 8 and 16 are both powers of 2 -- [tex]2^3[/tex] and [tex]2^4[/tex], we can rewrite the original equation by substituting those in:

[tex](2^3)^{2y+4}=(2^4)^{y+1}[/tex]

When you have an exponent raised to another exponent, you multiply those exponents together, so we can simplify our equation by distributing a 3 in the left exponent and a 4 in the right:

[tex]2^{3\cdot(2y+4)}=2^{4\cdot(y+1)}\\2^{3\cdot2y+3\cdot4}=2^{4\cdot y+4\cdot1}\\2^{6y+12}=2^{4y+4}[/tex]

With both of our bases the same, we can now simply compare their exponents directly to solve for y:

[tex]6y+12=4y+4\\2y=-8\\y=-4[/tex]

Answer:

Pretty sure it's 2 strides

Step-by-step explanation:

To get from 7 to 5 you minus by 2, and look how many spaces there are. There are 2

Answer:

Step-by-step explanation:

Good evening ,

P(A|B) = P(A∩B)/P(B)

P(B|A) = P(A∩B)/P(A)

:)

Answer:

Option d. [tex]4y+2x\leq -1[/tex]

Step-by-step explanation:

we know that

If a ordered pair is a solution of an inequality, then the ordered pair must be satisfy the inequality

Verify each case

case a) [tex]y\geq2x+8[/tex]

we have

[tex]x=5, y=-3[/tex]

Substitute the value of x and the value of y in the inequality and then compare the results

[tex]-3\geq2(5)+8[/tex]

[tex]-3\geq18[/tex] -----> is not true

therefore

the ordered pair is not a solution

case b) [tex]-2y<3x-9[/tex]

we have

[tex]x=5, y=-3[/tex]

Substitute the value of x and the value of y in the inequality and then compare the results

[tex]-2(-3)<3(5)-9[/tex]

[tex]6<6[/tex] -----> is not true

therefore

the ordered pair is not a solution

case c) [tex]y-2x>5[/tex]

we have

[tex]x=5, y=-3[/tex]

Substitute the value of x and the value of y in the inequality and then compare the results

[tex]-3-2(5)>5[/tex]

[tex]-13>5[/tex] -----> is not true

therefore

the ordered pair is not a solution

case d) [tex]4y+2x\leq -1[/tex]

we have

[tex]x=5, y=-3[/tex]

Substitute the value of x and the value of y in the inequality and then compare the results

[tex]4(-3)+2(5)\leq -1[/tex]

[tex]-2\leq -1[/tex] -----> is  true

therefore

the ordered pair is a solution

d. 4y+2x≤−1

Step-by-step explanation:

Answer:

S = 36

Step-by-step explanation:

s/3 +  14= 26

s/3 = 12

s = 36

Answer:

Step-by-step explanation: (1/3)*s+14 = 26 // - 26

(1/3)*s-26+14 = 0

1/3*s-12 = 0 // + 12

1/3*s = 12 // : 1/3

s = 12/1/3

s = 36

s = 36

Answer

So, Sam only asked 20 people in his entire middle school. That is a very small fraction of the amount of kids attending that school. He cannot say that video games is 75% of the entire school's favorite weekend activity if he only asked 20 people. To get a better, more valid result, he should ask around 100+ kids.

Step-by-step explanation:

Answer:

-4

Step-by-step explanation:

Okay so basically with functions you are gonna wanna substitute 7 where x is since x=7.

10-2(7) = ?

2 x 7 = 14

10-14=-4

Have a nice day hope this helps :)

:)

Answer:

Step-by-step explanation:

Just put 7 in the place of x

[tex]f(7)=10-2(7)\\f(7)=10-14\\f(7)=-4[/tex]

Answer:

option C. [tex]KL=2*JL[/tex]

option D. [tex]JK=\frac{\sqrt{3}}{2}*KL[/tex]

option F. [tex]JK=\sqrt{3}*JL[/tex]

Step-by-step explanation:

step 1

we know that

In the right triangle JKL

[tex]sin(30\°)=\frac{JL}{KL}[/tex]

[tex]sin(30\°)=\frac{1}{2}[/tex]

so

[tex]\frac{1}{2}=\frac{JL}{KL}[/tex]

[tex]KL=2*JL[/tex]

step 2

[tex]cos(30\°)=\frac{JK}{KL}[/tex]

[tex]cos(30\°)=\frac{\sqrt{3}}{2}[/tex]

so

[tex]\frac{\sqrt{3}}{2}=\frac{JK}{KL}[/tex]

[tex]JK=\frac{\sqrt{3}}{2}*KL[/tex]

step 3

[tex]tan(30\°)=\frac{JL}{JK}[/tex]

[tex]tan(30\°)=\frac{1}{\sqrt{3}}[/tex]

[tex]\frac{1}{\sqrt{3}}=\frac{JL}{JK}[/tex]

[tex]JK=\sqrt{3}*JL[/tex]

the slope is 2

4/2= 2

Answer:

g(x) is the image of f(x) after stretched horizontally

by scale factor = 5

Step-by-step explanation:

∵ f(x) = x² ⇒ quadratic function

∵ g(x) = (1/5 x)² ⇒ The image of f(x) after one transformation

* Stretches or compresses horizontally:

  It means stretches away from the y-axis

  or compresses toward the y-axis

* If f(x) = (ax)²  :

∵ |a| > 1 is a compression by factor of 1/a

∵ 0 < |a| < 1 is a stretch by factor of 1/a

∵ x-coordinate of f(x) multiplied by 1/5

∵ 0 < 1/5 < 1

∴ The transformation is ⇒ stretched horizontally

∴ g(x) is the image of f(x) after stretched horizontally

  by scale factor = 1 ÷ 1/5 = 5

[tex] {x}^{2} - 2x - 24 \\ = {x}^{2} - 6x + 4x - 24 \\ = x(x - 6) + 4(x - 6) \\ = (x - 6)(x + 4)[/tex]

Answer:

I  -3/20

Step-by-step explanation:

-3       2

---- * -----

8       5

Multiply the numerators

-3*2 = -6

Multiply the denominators

8*5= 40

The fraction is

-6/40

Both the top and the bottom can be divided by 2

-6/2 = -3

40/2 =20

The fraction becomes

-3/20

Answer:

The height is given by: 776.5 / 34.5 = about 22.5 yards. So....10 times this is about 225 yards.

Is there supposed to be a picture

Answer:

[tex]2\frac{2}{3}[/tex]

Step-by-step explanation:

Given : BC is parallel to DE

To Find : What is the length of CE?

Solution :

AB = 3

BD = 2

AC = 4

Since BC || DE

So, [tex]\frac{AB}{BD}=\frac{AC}{CE}[/tex]

[tex]\frac{3}{2}=\frac{4}{CE}[/tex]

[tex]CE=\frac{4 \times 2}{3}[/tex]

[tex]CE=\frac{8}{3}[/tex]

[tex]CE=2\frac{2}{3}[/tex]

Hence the length of CE is [tex]2\frac{2}{3}[/tex]

Two lines y = -x + 3 and y = 2x - 5 are graphed to find their intersection, which gives the x and y values that satisfy both equations.

To find x and y values that satisfy both equations y = -x + 3 and y = 2x - 5, we need to graph these equations and look for their point of intersection.

The intersection represents the x and y values that make both original equations true simultaneously. Use the graph to identify the coordinates of this point for the exact solution.

Out of the choices provided, only [tex]$(-3,5)$[/tex] lies on the intersection of the two lines. Thus the answer is a. [tex]$(-3,5)$[/tex].

Here's a step-by-step solution to find the x and y values that satisfy both equations:

1. Graph the Equations:

    Take the first equation, y = -2/3x + 3. This equation is in slope-intercept form (y = mx + b), where m (slope) is -2/3 and b (y-intercept) is 3.

     -   Plot the y-intercept (3) on the y-axis.

      -  Since the slope is -2/3, remember "rise over run." So in this case for every 2 positions you move down (because it's negative), you move  3 positions to the right. Plot another point based on this movement.

       - Connect these two points with a straight line.

  -  Repeat the process for the second equation, y = 2x - 5. This equation is also in slope-intercept form with m (slope) as 2 and b (y-intercept) as -5.

       - Plot the y-intercept (-5) on the y-axis.

       - The slope is 2, so for every 2 positions you move up, you move 1 position to the right. Plot another point based on this movement.

       - Connect these two points with a straight line.

2. Find the Intersection Point:

   - Observe the graph. The point where the two lines intersect represents the solution where both equations are true simultaneously.

   - In this case, the lines intersect at the point (-3, 5).

Verification:

   - You can substitute x = -3 and y = 5 in both the original equations and see if they hold true.

      - For y = -2/3x + 3, substituting x = -3 gives you y = (-(2/3) [tex]\times[/tex] (-3)) + 3 = 2 + 3 = 5 (which is true).

      - For y = 2x - 5, substituting x = -3 gives you y = (2 [tex]\times[/tex] -3) - 5 = -6 - 5 = -11 (which is not true).

Therefore, the solution (x, y) that makes both equations true is (-3, 5). This is the point where the two lines intersect on the graph.

The graph is provided below.

Answer:

[tex]\boxed{\bold{\left(3x-2\right)^2}}[/tex]

Step By Step Explanation:

[tex]\bold{\left(3x\right)^2-2\cdot \:3x\cdot \:2+2^2}[/tex]

[tex]\bold{\left(3x\right)^2-2\cdot \:3x\cdot \:2+2^2}[/tex]

[tex]\bold{\left(3x-2\right)^2}[/tex]

ANSWER

[tex]9 {x}^{2} - 12x + 4 = (3x - 2) ^{2} [/tex]

EXPLANATION

The given expression is

[tex]9 {x}^{2} - 12x + 4[/tex]

This is in the form

[tex]a {x}^{2} + bx + c[/tex]

[tex]a=9,b=-12 ,c=4[/tex]

[tex]ac=9 \times 4 = 36[/tex]

Split with -6x-6x

[tex]9 {x}^{2} - 6x - 6x + 4[/tex]

[tex] = 3x( 3x - 2) - 2(3x - 2)[/tex]

Factor further to obtain,

[tex] = (3x - 2)(3x - 2)[/tex]

[tex] = (3x - 2) ^{2} [/tex]

Answer:

lol

Step-by-step explanation:

The simplified expression is x + 46.

To simplify the expression, let's distribute and simplify each term:

4(-8x + 5) - (-33x - 26)

First, distribute 4 into -8x + 5:

= -32x + 20

Then, distribute -1 into -33x - 26:

= -32x + 20 + 33x + 26

Now, combine like terms:

= (-32x + 33x) + (20 + 26)

= 1x + 46

= x + 46

So, the simplified expression is x + 46.

Answer:   [tex]\bold{\dfrac{2}{65}}[/tex], Dependent

Step-by-step explanation:

[tex]\dfrac{\text{\# of vowels}}{\text{total \# of letters}}[/tex]

1st draw  and   2nd draw

     [tex]\dfrac{5}{26}[/tex]        x           [tex]\dfrac{4}{25}[/tex]     =     [tex]\dfrac{20}{650}[/tex]

[tex]\dfrac{20}{650}\div\dfrac{10}{10}=\dfrac{2}{65}[/tex]

This is dependent because the number of vowels remaining for the 2nd draw is dependent on whether or not a vowel was chosen on the 1st draw.

Answer: option b.

Step-by-step explanation:

Based on the information given, you know that:

- The ground is at 0 feet.

- The initial posititions of both elevators were at 0 feet (because both moved from the ground level).

Therefore:

- If the final position of Elevator 1 is at +17 feet (positive) means that it moved 17 feet above the ground level.

- If the final position of Elevator 2 is at -22 feet (observe the negative sign) means that it moved 22 feet below the ground level.

∴(108+27) cubic feet = 135 cubic feet of concrete are required.

The dimension of lower step is 6 ft× 3 ft× 1.5 ft

and the dimension of upper step is 6 ft ×(9-3)ft × (1.5+1.5)ft = 6 ft × 6 ft ×3 ft

Therefore concrete are required to make lower step = (6×3×1.5) cubic feet

                                                                                      = 27 cubic feet

and concrete are required to make upper step = (6×6×3) cubic feet

                                                                              =108 cubic feet

∴(108+27) cubic feet = 135 cubic feet of concrete are required.

complete questions

Tony needs to create a platform shaped like the diagram with the labeled dimensions.

How many cubic feet of concrete are required?

A) 60 cubic feet

B) 81 cubic feet

C) 108 cubic feet

D) 135 cubic feet

The area of the tile is 9 square inches.

The area of the tile is given by a product of length and width.

Given

The length of the tile = 3 inches

The width of the tile = 3 inches

The area of the tile is defined as the length of the tile and width of the tile.

[tex]\rm Area \ of \ the \ tile=Length \times Width\\\\[/tex]

Substitute all the values in the formula;

Area of the tiles = length × width

Area of the tile = 3 × 3

Area of the tile = 9

Hence, the area of the tile is 9 square inches.

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The area of a square (side*side) tile with sides of 3 inches is 9 square inches.

The question is asking for the area of a square tile with a side length of 3 inches. In mathematics, the area of a square can be found using the formula Area = side².

So, in this case, the area would be 3² = 9.

This means that the area of the tile is 9 square inches.

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Answer:

D

Step-by-step explanation:

5/5 -1/5=4/5

Answer: C= 50.2652

Step-by-step explanation:

The circumference of a circle with an area of 201.06 square inches is approximately 50.24 inches, after calculating the radius from the area and applying it to the circumference formula.

To find the circumference of a circle when given the area, you'll want to perform a series of mathematical steps. The area of a circle is given by the formula A = πr², and the circumference is given by C = 2πr. You can rearrange the area formula to solve for the radius, r, and then substitute that into the circumference formula.

First, solve for the radius:
A = πr² → r = √(A/π) → r = √(201.06/π).

Once you have r, plug it into the circumference formula:

C = 2πr.

Using a calculator, you'll find the following values:

The circumference of a circle with an area of 201.06 square inches is approximately 50.24 inches.

Answer:

The answer is (-3, 4).

Step-by-step explanation:

(3, 4) is located in Quadrant I, which is (+, +). Since you're reflecting the point across the x-axis, you'll be in Quadrant IV, which is (-, +). The point will now be (-3, 4).

I hope this helped! :-)

Answer:

x and see others below

Step-by-step explanation:

To find the equivalent expression, multiply the terms using exponent rules.

Exponent rules state to add the exponent of same bases being multiplied.

[tex]x^{\frac{1}{2}} *x^{\frac{1}{2}} =x^{\frac{1+1}{2}} =x^{\frac{2}{2}} = x^1 = x[/tex]

Each of the parts of the expression are equivalent. The simplified equivalent expression is x.

2)

P(4,-4) -->(-4, 7)

4 - 8 = -4           -------->left 8

-4 + 11 = 7         -------->up 11

Answer: left 8;  up 11

3)

C(3,-1) , left 4 up 1

3 - 4 = -1    -------->left 4

-1 + 1 = 0   -------->up 1

a)

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

C(3, -1) -->C'(-1 , 0)

b)

(x , y) --> (x - 4, y + 1); (-1 , 0)