40.00 for premium - 15.00 more than standard
40-15=35.00 for standard
I think it is 5/6 but I am not 100%
Answer:
<u>If mixed numbers are </u>
<u>You can write them as a sum of a whole and fraction and use the distributive property of multiplication:</u>
- a b/c × d e/f =
- (a + b/c) × (d + e/f) =
- ad + a(e/f) + d(b/c) + (b/c)(e/f)
So dad is represented by x
son is represented by y
so x is (x=) 7 times his son (7y)
our first sentence is x=7y
10 years later (x+10, y+10) he will be 3 times as old as his son (x+10=3(y+10))
or 10+x=3(y+10)
so our sentences are
x=7y
and
x+10=3(y+10)
first we subsitute x=7y for x in the second equation
(7y)+10=3(y+10)
7y+10=3(y+10)
we distribute
7y+10=3y+30
subtract 3y from both sides
4y+10=30
subtract 10 from both sides
4y=20
divide both sides by 4
y=5
the son is currently 5 years old
x=7y
subsitute y=5 for y in equation
x=7(5)
x=35
the dad is currently 35 years old
in 10 years
dad is 45 and son is 15
dad=35
son=5
You cant add the fractions until you change the denominator