Answer: 9^2 (81)+8^2(64)=12.04^2(144.97) which rounded/estimated is equal to 145
21 *78=
20 * 80=
1600 as an estimate
Answer: x = 9
Step-by-step explanation:
15 / 20 = (2x + 3) / 28
cross multiply
15(28) = 20(2x + 3)
420 = 40x + 60
360 = 40x
x = 9
