Hello,
let's assume j the john's age, m the mary's age.
<span>"John is twice as old as mary"==>j=2*m
</span>
<span>"the sum of their ages is 21" ==>j+m=21
==>2*m+m=21
==>3m=21
==>m=7
and j=21-7=14
</span>
Answer:
45
Step-by-step explanation:
h
The answer is AB={12 21 32 45}
I think z because if you flip the shape around it will create the same shape as z
Answer:
7:8
Step-by-step explanation:
Convert o.7 Kg to Gram
It will be 700 grams
Divide it by 800
<u>700</u>
800
= <u>7</u>
8
