Hello,
Let's assume f the age of the father,
s the age of the son.
<span>The age of a father is 2 less than 7 times the age of his son ==> f=7s-2 (1)
</span>
<span>In 3 years, the sum of their ages will be 52 ==>(f+3)+(s+3)=52 (2)
(2)==>f+s+6=52
==>f+s=46 (3)
(3) and (1) ==>7s-2+s=46
==>8s=48
==>s=6
f=46-6=40
</span>
Answer:
The answer is six.
Step-by-step explanation:
For a number to be divisible by nine means that the sum of the digits must be equivalent to a multiple of nine.
Answer:This is mutually exclusive
P(A) = 1/5
P(B) = 7/20
The formula is P= P(A)+P(B)
P = 1/5+7/20= 11/20
Step-by-step explanation:
Answer:
4 hours
Step-by-step explanation:
The truck works twice as fast as a lawn tractor, so is equivalent to 2 of them. Together, they are equivalent to 3 lawn tractors, so can do the job in 1/3 the time of one of them: 4 hours.
