4d + 6 = 42
4d = 42 - 6
4d = 36
d = <u>36</u>
4
d = 9
Answer:
25
Step-by-step explanation:
let his age be x, then
5 years ago his age was x - 5 and in 5 years will be x + 5 , thus
(x - 5)(x + 5) = 600 ← expand factors using FOIL
x² - 25 = 600 ( add 25 to both sides )
x² = 625 ( take the square root of both sides )
x =
= 25
When we have to divide fractions, we multiply the first one by the second one's reciprocal.
2/5 divided by 1/8
2/5x8/1
16/5
This is the simplest form of it. If you want to solve further the answer will be in decimals.
Hope it helped!
ur mom
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