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katie18147
12.07.2019 •
Mathematics
The length of a rectangle is three times as long as the width. find the dimensions if he perimeter is 72 inches
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Ответ:
Let l be the length of the rectangle and w be the width of the rectangle.
We have the equations:
l = 3w and 2l + 2w = 72;
So, we solve the equation 6w + 2w = 72;
8w = 72;
w = 72÷8;
w = 9 inchesl
l = 3·9;
l = 27 inches.
The dimensions of the rectangle are 27 inches and 9 inches.
Ответ:
Any number a +0 = a, and so does 0 +a equal a. For example, the equation b + 15 = 15 is solved by 0, because 0 +15 =15. The number 1 is the identity for multiplication, because any number multiplied by 1 is that number. Also, any number multiplied by zero will equal zero.