A football team is on the 40-yard line after four plays. On the first play they gained 15 yards. On the second play they lost 6 yards. They gained 3 yards on the third play and twice as many on the fourth play. On which yard line did the team begin?

the answer is a

step-by-step explanation:

answer: -2+√x,-2-√x

i hope this , i don't know if you're looking for a pair or not.

step-by-step explanation :

we know that

the measurement of the outer angle is the semi-difference of the arcs which comprises

in this problem

m< xzy is the outer angle

substitute the values

the measure of angle xoy is equal to

> by central angle

substitute the value