Question 1

Solve the equation.
-9x = 72

Accepted Answer

A) 63 
B) 62 
C) 7 
D) 8

Question 2

Solve the formula for the specified variable.
-A = P(1 + nr)for r

Accepted Answer

A)   
B)   
C)   
D)

Question 3

A formula is given, along with values for all but one of the variables in the formula. Find the value of the variable that is not given. Round to the nearest hundredth when necessary.
-P = 2L + 2w; P = 20, L = 7

Accepted Answer

A) L = 3 
B) w = 13 
C) w = 27 
D) w = 3

Question 4

Solve the equation.
-m - 0.0411 = 0.058

Accepted Answer

A) 0.0169 
B) 0.0991 
C) 0.0369 
D) 0.0491

Question 5

Write the phrase as a mathematical expression. Use x as the variable.
-The quotient of 1 less than a number and 8 more than the number

Accepted Answer

A)   
B)   
C)   
D) (x - 1)+ (x + 8)

Question 6

Determine if the proportion is true or false.
-

Accepted Answer

A) True 
 B)False

Question 7

Solve the problem.
-Doug and Inga can deliver 60 papers in 2 hours. How long would it take them to deliver 57 papers?

Accepted Answer

A) 2.1 hr 
B) 114 hr 
C) 2.9 hr 
D) 1.9 hr

Question 8

Solve the equation.
-2.27x = 16.117

Accepted Answer

A) 7.1 
B) 13.847 
C) 6.1 
D) 12.647

Question 9

Solve the equation.
-

Accepted Answer

A) 11.5 
B) 31.5 
C) 30.5 
D) 12.5

Question 10

Solve the equation.
--26.8 - k = 17.4

Accepted Answer

A) 9.4 
B) -9.4 
C) -44.2 
D) 44.2

Question 11

A formula is given, along with values for all but one of the variables in the formula. Find the value of the variable that is not given. Round to the nearest hundredth when necessary.
-I = prt; I = 16.8, p = 210, r = 0.01

Accepted Answer

A) t = 35.28 
B) t = 0.8 
C) t = 8 
D) t = 0.35

Question 12

Solve the equation.
-y - 1.2 = 2.3

Accepted Answer

A) 3.5 
B) 1.1 
C) 3.3 
D) 1.3

Question 13

Solve the equation.
-151 = 12x + 19

Accepted Answer

A) 124 
B) 120 
C) 11 
D) 6

Question 14

Write the phrase as a mathematical expression. Use x as the variable.
-The product of 17 and some number

Accepted Answer

A) 17 + x 
B) 17x 
C) 17 - x 
D)

Question 15

Write the phrase as a mathematical expression. Use x as the variable.
-135 added to a number

Accepted Answer

A) 135x 
B) 135 
C) 135 + x 
D) 135 - x

Question 16

Solve the problem.
-The amount of money in an account is given by  where P is the principal invested, r isthe interest rate (as a decimal), and t is the time of the investment. Find the amount at the end of 2 years if $600 is invested at 5%. Round to the nearest cent.

Accepted Answer

A) $900.00 
B) $630.00 
C) $1,350.00 
D) $661.50

Question 17

Solve the problem.
-At a movie theater, 46 more people attended the early show than the late show. There were 324 people who saw the movie that night. How many people attended the late show?

Accepted Answer

A) 139 
B) 185 
C) 370 
D) 278

Question 18

Write the phrase as a mathematical expression. Use x as the variable.
-Some number minus 51

Accepted Answer

A) x - 51 
B) 51 
C) 51x 
D) x + 51

Question 19

Write the phrase as a mathematical expression. Use x as the variable.
-Twice some number

Accepted Answer

A) 2 + x 
B) 2 - x 
C)   
D) 2x

Question 20

Translate the statement into a mathematical expression.
-Find the cost of 2 beds at b dollars each.

Accepted Answer

A) 2 + b 
B) 2b 
C)   
D) 2 - b

Exam 4: Equations and Formulas

Solve the equation. -9x = 72

Solve the formula for the specified variable. -A = P(1 + nr) for r

A formula is given, along with values for all but one of the variables in the formula. Find the value of the variable that is not given. Round to the nearest hundredth when necessary. -P = 2L + 2w; P = 20, L = 7

Solve the equation. -m - 0.0411 = 0.058

Write the phrase as a mathematical expression. Use x as the variable. -The quotient of 1 less than a number and 8 more than the number

Determine if the proportion is true or false. -

Solve the problem. -Doug and Inga can deliver 60 papers in 2 hours. How long would it take them to deliver 57 papers?

Solve the equation. -2.27x = 16.117

Solve the equation. -

Solve the equation. --26.8 - k = 17.4

A formula is given, along with values for all but one of the variables in the formula. Find the value of the variable that is not given. Round to the nearest hundredth when necessary. -I = prt; I = 16.8, p = 210, r = 0.01

Solve the equation. -y - 1.2 = 2.3

Solve the equation. -151 = 12x + 19

Write the phrase as a mathematical expression. Use x as the variable. -The product of 17 and some number

Write the phrase as a mathematical expression. Use x as the variable. -135 added to a number

Solve the problem. -The amount of money in an account is given by where P is the principal invested, r isthe interest rate (as a decimal) , and t is the time of the investment. Find the amount at the end of 2 years if $600 is invested at 5%. Round to the nearest cent.

Solve the problem. -At a movie theater, 46 more people attended the early show than the late show. There were 324 people who saw the movie that night. How many people attended the late show?

Write the phrase as a mathematical expression. Use x as the variable. -Some number minus 51

Write the phrase as a mathematical expression. Use x as the variable. -Twice some number

Translate the statement into a mathematical expression. -Find the cost of 2 beds at b dollars each.