Simplify.
1. a) −4 + 7 b) −2 − 9 c) −6(3)

Step-by-step explanation:

1(a) -4 + 7is the same as... 7 - 4 = 3

(b) -2 - 9 = -11for an easier trick...you just say..( 2 + 9 )= 11..then after obtaining your answer..put the negative sign(-) on your answer..(its only applicable if the numbers in the sum are all negative)

(c) -6(3) = -6 × 3

= -18

4.08%

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!