Answer:
Step-by-step explanation:
#7
- a) 2x + 4 = 11 ⇒ 2x = 11 - 4 ⇒ 2x = 7 ⇒ x = 7/2 ⇒ x = 3.5
- b) 30 - 2x = 16 ⇒ 2x = 30 - 16 ⇒ 2x = 14 ⇒ x = 14/2 ⇒ x = 7
- c) 28 + 9x = 55 ⇒ 9x = 55 - 28 ⇒ 9x = 27 ⇒ x = 27/9 ⇒ x = 3
#8
100 cookies in 2 hours.
The unit rate is:
- 100 / 2 = 50 cookies per hour
Find the number of cookies decorated in 5 hours:
Correct choice is D
