Ben positions his ladder against a wall so that the top of the ladder is 15 feet above the ground. About how long is his ladder? A. 16.2 feet
B. 18.6 feet
C. 10.5 feet
D. 21

Which expressions are equivalent to k/2 choose 2 answers: a k-2 b 2/k c 1/2k d k/2 e k+k

To solve the system of equations below, grace isolated the variable y in the first equation and then substituted into the second equation. what was the resulting equation? 3y=12x x^2/4+y^2/9=1

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much