Determine the volume of Concrete needed to Construct this ramp to the nearest tenth of a cubic metre.

plz let me know if you know the answer and how to work it out thanks​

-7/8

step-by-step explanation:

instead of subtracting you add the -6/8 and -1/8

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.