Pls help me on this Factor the following expressions
1) 2 + 6 2) 7 + 14 3) 30 + 6
4) − 3 − 12 5) 8 + 8 6) 45 − 25
7) 32 + 20 8)7 − 63 9)16 + 16
10) 2 − 10 11) − 42 − 54 12) 35 + 40
13) − 4 − 18 14) − 21 + 35 15) − 10 − 30
16) 30 + 70 17)4 + 40 18) 15 + 5 − 50
19) 9 − 27 20) − 18 + 27 21) 34 + 17y

What is the value of x? enter your answer in the box. (cm)

Aretha wanted to gather data about the cost of local bowling leagues in her area. she plotted the data and determined that the average bowling league costs consist of a one-time registration fee and a monthly fee modeled by the equation y = 15x + 20. identify and interpret the y-intercept in this model. the y-intercept is 20. this is the cost per month. the y-intercept is 20. this is the cost of registration. the y-intercept is 15. this is the cost of registration. the y-intercept is 15. this is the cost per month.

Find the solution of each of the following.