The difference of twice a number and five is three. find the number. translate the word problem to an equation. which steps describe how to solve the equation?

1. add 5 then multiply by 1/2
2. add 2 then multiply by 1/5
3. subtract 5 then multiply by -1/2
4. multiply by 1/2 then add 5

squares, rhombus, rectangles

the anwser is d) 75°

step-by-step explanation:

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!