Please help, thank you if you do!!

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 fraction 7/9 is equivalent to a percent that is greater than 100%. truefalse

Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cos of 61.6