For which of the following is x=-5 a solution? select all that apply. a) x+10=-5 b) -x^2+50=25 c) l2xl =10 d) x< 0 e) 2x< 10

Let's check each of the cases to determine the solution of the problem

case A) we have

Substitute the value of in the equation

------> the equation is not true

therefore

The value of is not a solution of the equation

case B) we have

Substitute the value of in the equation

------> the equation is true

therefore

The value of is a solution of the equation

case C) we have

Substitute the value of in the equation

-----> the equation is true

therefore

The value of is a solution of the equation

case D) we have

Substitute the value of in the inequality

--------> the inequality is true

therefore

The value of is a solution of the inequality

case E) we have

Substitute the value of in the inequality

--------> the inequality is true

therefore

The value of is a solution of the inequality

the answer is

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!