Unit 2B Study Guide Review

Sarah wants to make 6 dozen cupcakes for the class party. She has 8 1/2 cups of four which is 5 1/2 cups less than the total amount of four needed. How much flour is needed for the cupcakes?

• 13 cups

• 9 1/2 cups

• 14 cups

• 14 1/2 cups

Solve:

 $3.9x\ +\ 1.4\ =\ 17$  

• x = 1.6

• x = 4

• x = 5

• x = 4.7

Solve the equation:

 $5p\ +\ 9\ \frac{1}{2\ }\ =\ 75$  

• p = 84 1/2

• p = 65 1/2

• p = 16.9

• p = 13.1

Ms. Smith's age is 7 years less than 5 times Ben's age. If Ben is 13 years old, what is Ms. Smith's age?

• 72

• 58

• 48

• 86

Solve:

 $\frac{x}{-6}\ +\ 2\ =\ -10$  

• x = 72

• x = -72

• x = 2

• x = -2

Solve:

 $\frac{8w\ +\ 4}{4}\ =\ 13$  

• w = 0.281

• w = 8

• w = 52

• w = 6

Write the operations needed to solve this equation: 36 = -3 + 2x

• Add 3 to each side. Then divide each side by 2.

• Add 3 to each side. Then multiple each side by 2.

• Subtract 3 from each side. Then divide each side by 2.

• Subtract 3 from each side. Then multiply each side by 2.

Solve the equation: 4c - 6 + 10c + 13 + 8 = 36

• c = 1.5

• c = 0.642

• c = 1.36

• c = 6

Solve the equation: 2(4a - 5) + 3a = 23

• a = 11

• a = 3

• a = 1.1

• a = 2.55

Cameron has a stamp collection. He bought 9 more stamps. A week later, half of all his stamps were destroyed when he dropped them in a mud puddle. There are now only 25 stamps left. With how many did he start? Which equation would be used to solve this situation?

• $x\ +\ 9\ =\ 25$

• $\frac{x\ +\ 9}{2}\ =\ 25$

• $\frac{25\ +\ 9}{2}=\ x$

• $2\left(25\ +\ 7\right)\ =\ x$