An average fly has a mass of $0.048$ grams. An average ant has a mass of $3.12\ \times\ 10^{-3}$ grams. Would $3.99$ million flies or $47,000,000$ ants have a greater mass?
Approximately how much greater, in grams, would the greater mass be? Justify your answers.

What are the relative frequencies, to the nearest hundredth, of the rows of the two-way table? group 1: a 15 b 45 group 2: a 20 b 25

Which of these choices show a pair of equivalent expressions?

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