Chapter 13 Test Review

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x=5

During a drought, the water level of a lake changes -3 1/5 feet per day. Write and solve an equation to find how long it takes for the water level to change -16 feet.

x=11

The floor of a canyon has an elevation of -14.5 feet. Erosion causes the elevation to change by -1.5 feet per year. How many years will it take for the canyon floor to have an elevation of -31 feet?

x=2 3/5

The perimeter of the triangle is 45. Find the value of x. The sides are 5x, 17, and 15.

8x

Write an expression in simplest form for the perimeter of a exercise mat with a length of 3x and a width of x.

x=9.424

You lose 0.3 point for stepping out of bounds during a floor routine. Your final score is 9.124. Write and solve an equation to find your score before the penalty.

x=9.28

You withdraw $29.79 from your bank account. Now your balance is -$20.51. Write and solve an equation to find the amount of money in your bank account before you withdrew the money.

5x + 4

7x + 6 + 3x - 2 - 5x

3x+1

A basket holds x apples. You pick 2x-3 apples, and your friend picks x+4 apples. Write an expression that represents the number of apples you and your friend picked.

x=6 7/8

A basketball game has four quarters. The length of a game is 32 minutes. You play the entire game except for 4 1/2 minutes. Write and solve an equation to find the mean time you play per quarter.

1.5x-3.2

Simplify the expression. -1.5(4-x)+2.8

-7 + 7x

Simplify the expression. -7 + 3x + 4x

2x-18

Simplify the expression. 1/8(16x-8)-17

8x

Simplify the expression. 2(3x + x)

6.5x-3

Simplify the expression. 2.5x-3+3x

2x + 6

Simplify the expression. 2x + 4 - 3x + 2 + 3x

15+3x

Simplify the expression. 3(5-2x)+9x

9/20x+12

Simplify the expression. 3/5x+19-3/20x-7

1/14x+6

Simplify the expression. 5/7x+15-9/14x-9

10x-5

Simplify the expression. 8x-5+2x

x=-2 1/3

Solve the equation. -14=6x

x = 2.1

Solve the equation. -2x + 3.7 = -0.5

x=7

Solve the equation. -2x+6=-8

x=-9

Solve the equation. -4(x+3)=24

x=4.22

Solve the equation. -5x+2.3=-18.8

x=2.38

Solve the equation. -6.5 + x = -4.12

x=-4

Solve the equation. -6x-7=17

x=-12

Solve the equation. -8x-5x+7x=72

x=-1/30

Solve the equation. -9/4x+4/5=7/8

x=-2

Solve the equation. 2(x+1)=-2

x=13 1/2

Solve the equation. 2-x/3=-5/2

x=-7

Solve the equation. 2/7x -3/8=-19/8

x=-36

Solve the equation. 2/9x=-8

x=-8/9

Solve the equation. 3(3x-4)=-20

x= -10 1/4

Solve the equation. 4 1/2 + x = -5 3/4

x=-3.5

Solve the equation. 4+2.2x=-3.7

x=-6.4

Solve the equation. 7.3x-5.18=-51.9

x=-3/7

Solve the equation. 7x=-3

x=-9.1

Solve the equation. x+14.5=5.4

x= -28

Solve the equation. x/-7 = 4

x=1 1/3

Solve the equation. x/4-5/6=-1/2

x=-12

Solve the equation. x/6+5/8=-1 3/8

x=-3.5

Solve the equation. -3x-4.6=5.9

9x + 2

-3(x - 4) - 2(-6x +5)

-10x+29

Find the difference. (2-7x)-3(x-9)

8x-17

Find the difference. (2x-13)-(-6x+4)

6x-9

Find the difference. (8x-3)-(2x+6)

3x - 10

Find the difference. (x - 8) - (-2x + 2)

-18.5x+28.1

Find the difference. -2.5(2x-5)-3(4.5x-5.2)

-4/15x-8

Find the difference. 2/5(x-10)-2/3(x+6)

-13x + 8

Find the sum. (2 - x) + 3(-4x + 2)

11x+4

Find the sum. (3x+11)+(8x-7)

12x - 1

Find the sum. (9x + 5) + (3x - 6)

4x + 4

Find the sum. (x + 12) + (3x - 8)

4x+5

Find the sum. (x-4)+(3x+9)

7/12x

Find the sum. 1/4(x - 12) + 1/3(x + 9)

12x+6

Find the sum. 3/4(8x+12)+3/8(16x-8)


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