49 terms

>= means greater than or equal to
<= means less than or equal to
^ means the number is squared
Some questions require you to graph equations. No graphs will be given.
Currently a work in progress. I will update answers as the break continues.
Work is shown first. Then the answer is at the bottom.

Evaluate the expression.

11 + 8 x 3^ - 8

11 + 8 x 3^ - 8

11 + 8 x 3^ - 8

11 + 8 x 9 - 8

11 + 72 - 8

83 - 8

75

11 + 8 x 9 - 8

11 + 72 - 8

83 - 8

75

Evaluate the expression.

2/3 ((5 + 2)^ - 13)

2/3 ((5 + 2)^ - 13)

2/3 ((5 + 2)^ - 13)

2/3 (7^ - 13)

2/3 (49 - 13)

2/3 (36)

24

2/3 (7^ - 13)

2/3 (49 - 13)

2/3 (36)

24

Evaluate the expression.

5k^ - 7k when k=3

5k^ - 7k when k=3

5(3^) - 7(3)

5(9) - 7(3)

45 - 21

24

5(9) - 7(3)

45 - 21

24

Check whether the given number is a solution of the equation or inequality.

7x-11=17;4

7x-11=17;4

7(4)-11=17

28-11=17

17=17

yes

28-11=17

17=17

yes

Check whether the given number is a solution of the equation or inequality.

9y + 3 < 13; 2

9y + 3 < 13; 2

9(2) + 3 < 13

18 + 3 < 13

21 < 13

no

18 + 3 < 13

21 < 13

no

Check whether the given number is a solution of the equation or inequality.

5z - 9 >= 7z - 11; -2

5z - 9 >= 7z - 11; -2

5(2) - 9 >= 7(5) - 11

10 - 9 >= 35 - 11

1 >= 24

no

10 - 9 >= 35 - 11

1 >= 24

no

Solve. 5 + (-13)

5 - 13

-8

-8

Solve. -17 + (-21)

-17 - 21

-38

-38

Solve. 15 - (-12)

15 + 12

27

27

-7(-11)

77

-1/2(15)(-8)

-15/2(-8)

60

60

72/-6

-12

Find the square root of 169.

13

Find the negative square root of 9.

-3

Find the positive and negative square roots of 256.

16 and -16

Find the positive and negative square roots of 0.04.

0.2 and -0.2.

Solve, if possible. x + 7 = 19.

x + 7 = 19

- 7 - 7

x = 12

- 7 - 7

x = 12

Solve, if possible. 23 - y = 14

23 - y = 14

-23 -23

-y = -9

y = 9

-23 -23

-y = -9

y = 9

Solve, if possible. 7p - 11 = 10

7p - 11 = 10

+11 +11

7p = 21

p = 3

+11 +11

7p = 21

p = 3

Solve, if possible. q/4 + 8 = 13

q/4 + 8 = 13

-8 -8

q/4(4) = 5(4)

q = 20

-8 -8

q/4(4) = 5(4)

q = 20

Solve, if possible. 15j + 7 j = 11

22j/22 = 11/22

j = 1/2

j = 1/2

Solve, if possible. 14m + 7 - 8m = -17

14m - 8m + 7 = -17

6m +7 = -17

-7 -7

6m/6 = -24/6

m = -4

6m +7 = -17

-7 -7

6m/6 = -24/6

m = -4

Solve, if possible. -3.1t + 4.3 = -1.9t + 3.7

-3.1t + 4.3 = -1.9t + 3.7

-4.3 -4.3

-3.1t = -1.9t - 0.6

+1.9t +1.9t

-1.2t/-1.2 = -0.6/-1.2

t = 1/2

-4.3 -4.3

-3.1t = -1.9t - 0.6

+1.9t +1.9t

-1.2t/-1.2 = -0.6/-1.2

t = 1/2

Solve, if possible. 3(4k - 2) = 16k -32

12k -6 = 16k -32

+6 +6

12k = 16k - 26

-16k -16k

-4k/-4= -26/-4

k = 13/2

+6 +6

12k = 16k - 26

-16k -16k

-4k/-4= -26/-4

k = 13/2

Solve, if possible. 1/3(9g - 6) = 3/5(5g + 15)

3g - 2 = 3g + 9

3g = 3g + 11

no solution/not possible

3g = 3g + 11

no solution/not possible

A student can read 4 pages in 5 minutes. How many pages can the student read in 60 minutes.

4/5 = 60/x CROSS MULTIPLY

300/4 = 4x/4

x = 75

75 pages

300/4 = 4x/4

x = 75

75 pages

What precent of 38 is 15.2?

38p/38 = 15.2/38

p = .4

40%

p = .4

40%

What number is 35% of 150.

150(.35) = n

n = 52.5

52.5

n = 52.5

52.5

At your school, 74% of students bought their lunch at the cafeteria. There are 1250 students in the school. How many students bought their lunch.

1250(.74) = b

b = 925

925 students

b = 925

925 students

Solve ax + by = c for a.

ax+by=c

ax=-by+c

a=(-by+c)/x

ax=-by+c

a=(-by+c)/x

Solve ax - y/b =c for y

ax-y/b=c

-y/b=-ax+c

-y=-abx+bc

y=abx-bc

-y/b=-ax+c

-y=-abx+bc

y=abx-bc

Plot point A(3, 6) on a coordinate plane and describe its location on the graph.

(3, 6) is in Quadrant I.

Plot point B(-2, -4) on a coordinate plane and describe its location on the graph.

(-2, -4) is in Quadrant III.

Plot point C(0, -3) on a coordinate plane and describe its location on the graph.

(0, -3) is on the x-axis.

Find the slope of the line that passes through the points (4, 8) and (5, 13).

(13-8)/(5-4)

5/1

The slope is 5.

5/1

The slope is 5.

Find the slope of the line that passes through the points (-3, 6) and (2, 7).

(7-6)/(2--3)

1/5

The slope is 1/5.

1/5

The slope is 1/5.

Find the slope of the line that passes through the points (-8, -2) and (-5, -2).

(-2--2)/(-5--8)

0/3

The slope is undefined.

0/3

The slope is undefined.

Graph y-2x=-3.

y-2x=-3

y = 2x + 3

Possible points: (0, 3), (1, 5), (2, 7), (-1, 1), (-2, -1)

y = 2x + 3

Possible points: (0, 3), (1, 5), (2, 7), (-1, 1), (-2, -1)

Graph x = -4.

Possible points: (-4, -2), (-4, -1), (-4, 0), (-4, 1), (-4, 2)

Graph y = 3/5x +3.

Possible points: (-10, -6), (-5, 0), (0, 3), (5, 6), (10, 9)

Evaluate f(x) = -1/2x + 3 when x = -2.

f(-2) = -1/2(-2) + 3

f(-2) = 1 + 3

f(-2) = 4

f(-2) = 1 + 3

f(-2) = 4

Evaluate g(x) = 8x - 7 when x = 0.5.

g(0.5) = 8(0.5) - 7

g(0.5) = 4-7

g(0.5) = -3

g(0.5) = 4-7

g(0.5) = -3

The amount of water w (in thousands of gallons) flowing over a dams spillway varies directly with time t (in hours). In four hours, six thousand gallons of water flow over the spillway. Write a direct variation equation that related w and t. How many gallons of water will be released in twelve hours?

w = at

6 = 4a

3/2 = a

w = 3/2(12)

w = 18

w = 3/2t; 18 thousand gallons

6 = 4a

3/2 = a

w = 3/2(12)

w = 18

w = 3/2t; 18 thousand gallons

Write an equation in slope-intercept form that passes through the point (-1, 3) and has a slope of 2.

3 = 2(-1) + b

3 = -2 + b

5 = b

y = 2x + 5

3 = -2 + b

5 = b

y = 2x + 5

Write an equation in slope-intercept form that passes through the point (4, -3) and has a slope of 3/4.

-3 = 3/4(4) +b

-3 = 3 + b

-6 = b

y = 3/4x - 6

-3 = 3 + b

-6 = b

y = 3/4x - 6

Write an equation in slope-intercept form that passes through the point (2, -7) and has a slope of -5.

-7 = -5(2) +b

-7 = -10 + b

3 = b

y = -5x + 3

-7 = -10 + b

3 = b

y = -5x + 3

Write an equation in standard form of the line that passes through the point (3, -7) and has a slope of -7.

y + 7 = -7(x - 3)

y + 7 = -7x + 21

y = -7x + 14

7x + y = 14

y + 7 = -7x + 21

y = -7x + 14

7x + y = 14

Make a scatter plot using the points (0, 7), (2, 16), (4, 25), (6, 38), and (8, 50). Describe the correlation of the data.

...

Solve and graph x - 13 < -8

x - 13 < -8

x < 5

x < 5