Kalil and Mara were working on their math homework. Mara write 4/5 as 1/5 + 1/5 + 1/5 + 1/5. Kalil looked at Mara’s work and said, “I think you could use multiplication to rewrite your equation.” Is kalil’s observation correct? Explain

Yes the observation is correct.

If we had 1+1+1+1, then this shortens to 4*1

Similarly, 1/5 + 1/5 + 1/5 + 1/5 = (1+1+1+1)/5 = (4*1)/5 = 4*(1/5)

We have four copies of 1/5 being added, which is why we multiply 4 by 1/5.

Yes

Step-by-step explanation:

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb

a and c

step-by-step explanation: