Reena has 12 more dimes than she does quarters. if reena has a total of 28 coins, how many quarters, qq, and how many dimes, dd, does reena have? use the equations and the graph below to arrive at your answer.
q = d –12
q = 28 –d
a. 28 dimes and 12 quarters
b. 20 dimes and 8 quarters
c. 12 dimes and 28 quarters
d. 8 dimes and 20 quarters

Arianna is buying plants for her garden. she buys 15 flowering plants for $96. pink flowering plants sell for $8, and purple flowering plants sell for $5. how many pink flowering plants did arianna buy? i figured out the answer! the answer is 7. 8x +5y = 96 plug in 7 for x 8 (7) + 5y = 96 56 + 5y = 96 subtract 56 from both sides 5y/y = 40/5 y = 8 she bought 7 pink and 8 purple plants

The number of fish in a lake can be modeled by the exponential regression equation y=14.08 x 2.08^x where x represents the year

42. if 20 men can eat 200 kg of wheat in 40 days, then 10 men can eat 300 kg of wheat in how many days? a) 120 days b) 60 days c) 80 days d) none of these