Answer:
commutative property of multiplication
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1, 3, and 4
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yes
no
Answer:
Width is 5 ft, length is 10ft.
Plug in the information given from the problem, in which the width is x, and the length is x + 5.
x(x+5) = x^2 + 5x
(x+4)(x+9) = x^2 + 13x +36
x^2 + 13x +36 - (x^2 + 5x) = 76
Simplify and result in 8x = 40
x = 5, which makes the length 10.
1, 1, 1, 1, 1
Any 5 values that are the same will have 0 std dev.
The ratio, r, is 20 - 13 = 27 - 20 = 34 - 27 = 7;
The nth term has the formula: an = a1 + (n-1) x r; where, a1 = 13 and r = 7;
Then, an = 13 + (n-1) x 7;
Finally, an = 13 + 7 x n - 7;
an = 7 x n + 6;
8 can't be square rooted as an integer. Therefore the answer can only result in a being a decimal, in double brackets or it can be a trick question.