7×(4+8)=(_ ×4)+(7 ×8) What makes the number sentence true

A. 1

B. 3

C. 7

D. 8

E. 12

C: 7

Step-by-step explanation:

It is C because 7(4+8) is 84 and 7*8 is 56 now 84-56 is 28 so x*4 is 28 so 28/4 is equal to 7. I hope I've helped. If you need further explanation please comment below.

you would have to sell 24 bracelets.

step-by-step explanation:

84/3.5 = 24

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