Achina cup and saucer cost 12$. the cup on its own cost 3$ more than the saucer. form an eqaution for s and solve it. find the cost of the cup

If the cup = S + 3
and the
saucer = S
then

(S + 3) + S = 12
2s + 3 = 12
2s = 9
s = 4.50

So by itself the saucer costs $4.50. To find the cost of the cup look to the beginning of the problem where we learned that

Cup = S + 3
cup = 4.50 + 3
cup = 7.50

So the saucer is $4.50 and the cup is $7.50...

4.50 + 7.50 = $12.00

It checks!

1. u must simplify 3^2 first because the order of operations states that u have to do exponents before subtraction.

2. 12 - 3^2 = 81she subtracted the 3 first12 - 3^2 = 9^2 = 81...which is an incorrect answer

3. u do not divide before simplifying 3^2order of operations states that u have to do exponents before division

4. no(12 - 3)^2 order of operations states that u do parenthesis before exponents...so (12 - 3)^2 = 9^2 = 81