How many of the students correctly apply only associative property to rewrite the expression

not sure

Only one student, Melinda used it right.

Step-by-step explanation:

Associative property lets us place our brackets the way we want and the result would be unchanged.

Here: (13 + 15 + 20) + (20 + 47 + 18).

So, we can place the brackets in any form, like (13 + 15) + (20 + 20) + (47 + 18).

There are many ways to do it. Melinda's was is yet another example.

Note that Associative property does not hold for subtraction.

answer: 1, 3 and 5 are correct

step-by-step explanation:

75

step-by-step explanation:

you do x-29=46 (the number of cantaloupes sold)

in order to find x, you have to find what minus 29 equals 46, meaning you'd have to add 29 to 46.

29+46=75

if you replace x with 75, the equation looks like:

75-29=46

x=75