Answer: 5.4
Step-by-step explanation:
Answer:
<u>$192</u>
Step-by-step explanation:
5% = 0.05
160 x 0.05 = $8 (sales tax)
15% = 0.15
160 x 0.15 = %24 (tip)
$8 + $24 = 32
$160 + $32 = $192
Answer to part A: 11w^2+7z^2
Answer to part B: 14w^2+9w
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Explanation:
For part A, the expression 4w^2+7w^2+7z^2 has one pair of like terms. That pair is 4w^2 and 7w^2 which combine to 11w^2. You add the coefficients to get 4+7 = 11, then tack w^2 onto everything to say 4w^2+7w^2 = 11w^2
We cannot combine 11w^2 and 7z^2 as they aren't like terms. So we leave it as 11w^2+7z^2
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In part B, the like terms are 15w and -9w. They combine to 15w-9w = 6w. You can think of it like 15-9 = 6 then stick a 'w' to each term. We cannot combine the w^2 term with the w terms.
