Which operation should be performed first according to the order of operations?

21 – 5 + 24 ÷ 3 + 90 • 4

a.
21 – 5

b.
5 + 24

c.
24 ÷ 3

d.
90 • 4

Of four points are collinear, they are also coplanar

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

Find the domain of the following expression: 1/(√x)-2