Replace x in the equation with -1 and solve:
6(-(-1) + 3)
Simplify the parentheses: 6(1 + 3)
Add inside the parentheses:
6(4)
Multiply
6 x 4 = 24
Answer : 24
50 is not a perfect square because it does not have a perfect square root where as 49 is 7, 121 is 11, and 1 is 1
27 is 144 percent of what. Let the what be x.
27 = 144% of x
27 = (144/100)x
(144/100)x = 27
1.44x = 27 Divide through
x = 27/1.44 Use your calculator
x = 18.75
Therefore 27 is 144 percent of 18.75
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The length is two inches less than five times the width. This means
Length (L) = 5w - 2. (Does this make sense? You calculate 5 times the width and then minus 2)
Then we know the perimeter of a rectangle is 2(L+w) so
Perimeter = 2(5w-2 + w) = 2(6w-2) = 12w - 4 (so C and D are both correct because they are equal)
We check the other two options manually,
A: 2(5w-2)+2w = 10w-4+2w = 12w - 4 (so A is correct because it equals D which also equals C)
B: w+w+5w+5w-2 = 12w - 2 (which does not equal any of the other options)
So correct answers are A, C and D because they are all equal.
