Geometry | can some me? i'm really confused (20 points + brainliest)

answer:

60% of y is 72

step-by-step explanation:

25% of y is 30 so multiply 30 by 4 and you get 120. multiply 120 by .60 and that leaves you with 72 as your answer.

answer:

2x + y = 4

3x - y = 6

i + ii

2x + y + 3x - y = 4 + 6

5x = 10

x = 2

2*2 + y = 4

y = 0

answer:

- 1.613 = -1.6 or -1.61

-1.522 = -1.5 or -1.52

0.587 = 0.6 or 0.59

3.079 = 3.1 or 3.08

answer:

x = 17

step-by-step explanation:

10x - 22 = 8x + 12

2x = 34

  x = 17