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.
Answer:
50.24 meters
Step-by-step explanation:
The equation for the circumference of a circle: 2πr
2 x 3.14 x 8 = 50.24
Answer:
69
Step-by-step explanation:
basically write the triangle in degree language like this is a acute angle because this is a 70* degree angle and talk more
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