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>

3 0

3 years ago

Please urgent help me out

wel

Answer:

i don't know sorry...........

3 0

3 years ago

<img src="https://tex.z-dn.net/?f=3q%2B2p%2B7" id="TexFormula1" title="3q+2p+7" alt="3q+2p+7" align="absmiddle" class="latex-for

kirza4 [7]

Answer:

that seem pretty hard but i think ik it

6 0

3 years ago

John is a quarterback. This year, he completed 350350350 passes, which is 70\%70%70, percent of all the passes he's attempted th

-Dominant- [34]

let 'x' represent the number of all the passes for the year

350 passes = 70% of all the passes

350 passes = 70% of x

0.70x = 350

by solving we find:

x = 500 passes

6 0

3 years ago