Marco wants to buy a new smartphone that costs $495 , with some additional accessories He has already saved 75 $ write and solve an inequality to find the least amount of money ,m, that Marco still needs to save before he can buy the smartphone and accessories

He has to save at least $420 .

Step-by-step explanation:

Hi, to answer this question we have to write an inequality using the information given:

The amount he has already saved (75) plus the money he still needs to save (x) must be higher or equal to the cost of the Smartphone and accessories.

75 +x ≥ 495

Solving for x:

x ≥ 495-75

x ≥ 420

He has to save at least $420.

goog may have it for you

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!