Are the ratios 20:8 and 5:2 equivalent?

They are equivalent.

Step-by-step explanation:

They are equivalent because you can divide the first one by 4 and get 20/4 8/4.

Therefore you get 5:2 you can check the answer and you can get 5x4 and 2x4 which equals 20:8

99

step-by-step explanation:

= 5

step-by-step explanation:

to find the 15th term substitute n = 15 into the nth term formula

= (- 3 × 15 ) + 50 = - 45 + 50 = 5