( 4 )hours for Wendy by herself because if it takes mark 7 hours by him self and 3 with Wendy, it will take Wendy 4 hours because 7 from 3 is 4
Assuming right angle, root 10^2+12^2 and you get 2 root 61
53/3
we can't divide this term perfectly because 53 is not 3's double number.
X ≥ 90 + 3x
You simplify the right side, then subtract 180 from both sides, then multiply by negative one.
