Answer:
-75
Step-by-step explanation:
3(-30)=-90
-90+15 is -75
Answer:
Perimeter = ![(30-\frac{3}{2}x)](https://tex.z-dn.net/?f=%2830-%5Cfrac%7B3%7D%7B2%7Dx%29)
Step-by-step explanation:
Width of the rectangle has been given as
.
Convert the statement into the algebraic expression,
"Length of the rectangle is twice the width"
Length = 2(Width)
= ![2(5-\frac{1}{4}x)](https://tex.z-dn.net/?f=2%285-%5Cfrac%7B1%7D%7B4%7Dx%29)
= ![10-\frac{1}{2}x](https://tex.z-dn.net/?f=10-%5Cfrac%7B1%7D%7B2%7Dx)
Since perimeter of a rectangle is given by the expression,
Perimeter = 2(Length + Width)
By substituting the values of length and width in the expression,
Perimeter = ![2[(5-\frac{1}{4}x)+(10-\frac{1}{2}x)]](https://tex.z-dn.net/?f=2%5B%285-%5Cfrac%7B1%7D%7B4%7Dx%29%2B%2810-%5Cfrac%7B1%7D%7B2%7Dx%29%5D)
= ![2(15-\frac{3}{4}x)](https://tex.z-dn.net/?f=2%2815-%5Cfrac%7B3%7D%7B4%7Dx%29)
=
Therefore, expression representing perimeter is
.
The answer is 286/52=5.5 hours
<h3>
Answer: Choice D) 3.7 * 10^6</h3>
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Explanation:
Place a decimal point between the first two digits 3 and 7.
Now ask yourself how you can go from 3.7 back to the original value. Notice we can move the decimal point 6 spots to the right to go from 3.7 back to 3,700,000
Therefore, the exponent over the 10 is 6. The exponent is positive to mean we move the decimal point to the right. If we had a negative exponent, then we'd move left.
You can use a calculator to confirm that 3.7 * 10^6 = 3,700,000
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Side notes:
3,700,000 = 3 million, 7 hundred thousand
3,700,000 = 3.7 million