Maria = x
Tom = y
Use substitution
x+y=30
2y=x
2y+y=30
3y=30
y=10
Tom is 10 years old.
x+y=30
x+10=30
x=20
Maria is 20 years old.
1/15=144/x
Cross multiply
X=2,160
Gymnasium=2,160 ft2
First you multiply the last term by the first term (3h+16h+15). Then find numbers that add to 16 and multiply to 15 then add or subtract it from (3h+15)(3h+1). Then factor if possible (h+5)(3h+1)
You have to explain how you knew to use 55 and 120, not another option.
Hope it helped! :)
2x+8–10=22
2x=24
x=24/2
x=12
yes! you’re absolutely right, i hope i helped you
