Two times x is 8 more than y. The sum of x and two times y is 14. Write two equations and graph to find the value of y. y = -6

y = 4

y = -4

y = 4

Step-by-step explanation:

2x = y+ 8

x + 2y = 14

x = 14 - 2y

2 * (14 - 2y) = y + 8

28 - 4y = y + 8

y + 4y = 28 - 8

5y = 20

y = 4

x = 14 - 2*4 = 6

b i think

step-by-step explanation:

not really sure

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!