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Aleonysh [2.5K]
3 years ago
12

The father is 60 years old and his son is half his age. how old was the boy when his father was 4 times his age?

Mathematics
1 answer:
Colt1911 [192]3 years ago
7 0
Let y= years ago when dad's age was 4 times son's age

60-y=4(30-y)
60-y=120-4y
-y+4y=120-60
3y=60
y=60/3
y= 20 years ago

Then 30-20= 10 yrs. old, the boys age when his dad was 40 years old.
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Step-by-step explanation:

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5 0
3 years ago
Complementary events must have a sum of 1.
Bas_tet [7]

This is a true statement.

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Example:

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8 0
4 years ago
6. Blake went to the grocery store at 6:30PM, He returned to his house around 9:14PM after running
zhenek [66]
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5 0
3 years ago
A right triangle has side lengths 19 inches, 180 inches, and 181 inches. What is the length of the hypotenuse and why?
IgorC [24]

Answer:

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4 0
3 years ago
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Olegator [25]

Answer:

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Step-by-step explanation:

The area covered by the furniture can be subtracted from the total area of the room to calculate the area of the gray region.

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Area of gray region = total area of the room - area taken up by furniture

Area of gray region = 13x^2+7x-2-(5x^2-x+5)

Remember to distribute the negative sign:

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Combine like terms:

Area of gray region = 8x^2+8x-7

7 0
3 years ago
Read 2 more answers
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