2.5 x 2.5 x 2.5 - 1.4 x 1.4 x 1.4
(2.5)2+ 2.5 X 1.4 + (1.4)2

a) 2.5×2.5×2.5-1.4×1.4×1.4=12.881

b) (2.5)2+2.5×1.4+(1.4)2=31.5

Step-by-step explanation:

yuh multiple 2.5 three times and subtract 1.4 multiple three times. 2.5×2.5×2.5-1.4×1.4×1.4

15.625-2.744=12.881.

b) when opening bracket Yuh multiple the number in the bracket by the number outside the bracket. when bracket is open Yuh can now add, multiple to obtain your answer please

(2.5)2+2.5×1.4+(1.4)2

5+2.5×1.4+2.8

7.5×4.2=31.5

1.96

Step-by-step explanation:

since there is a power on 1.4 which is 2

1.4^2

it will be 1.4 x 1.4 = 1.96

Dont times this number twice it will be a wrong answer.

1.4 x 2 = 2.8  Wrong answer.

The answer is 1.96

answer: 7 x 2/5 = 2.8 hours, is your answer. your welcome! : 3

step-by-step explanation: first work out how long it took to hose 1/7 of the lawn which is 2/5 hours. times that by 7 to get the whole lawn.

sorry i don't know the other answer. i didn't learn what a proportional relationship is.