Since the surface is 3 feet wide around the pool add 6 feet to both dimensions ( 3 feet x 2 = 6).
12 ft + 6 ft. = 18 feet
15 ft + 6ft. = 21 feet
Perimeter = 2L + 2W
Perimeter = 2(18) + 2(21)
Perimeter = 36 + 42
Perimeter = 78 feet.
Answer:
81
Step-by-step explanation:
9^2 means that you are squaring nine
when you square a number you multiply it by itself
so
9 x 9 =81
hope this helps :)
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.
Or
$6.29
1 Pound = $25.16
I hope that it answered your question.