consider the following situation: Mr. Richards wants to buy disposable masks for his family. Elure masks cost $1.50 and white masks cost $2.50. He has $45 to spend and wants to buy a total of 20 masks. 12. Define your variables and write an equation to represent the number of masks Richards is buying. 13. Using the same variables write an equation to represent the cost of the masks Richards is buying. 14. Choose either substitution or elimination and solve the system of equations you have created to determin many of each color Richards can buy. Show all of your steps.​

$12. that is my answer.

i think u have 12 apples sorry again i don't really know if it correct i'm just tryna hrlp people out.

the polynomial is a perfect square trinomial of the form a^2-2ab+b^2:

option a. true

step-by-step explanation:

9x^2-12x+4

comparing with the form a^2-2ab+b^2

1.) a^2=9x^2

solving for a: square root both sides of the equation:

sqrt(a^2)=sqrt(9x^2)

a=sqrt(9) sqrt(x^2)

a=3x

2.) b^2=4

solving for b: square root both sides of the equation:

sqrt(b^2)=sqrt(4)

b=2

to be a perfet square trinomial 2ab must be equal to 12x. let's check:

2ab = 2 (3x) (2)

2ab = 12x

correct