Yesterday in a lab experiment there were "x" milligrams of bacteria. Today, there are x squared milligrams of bacteria. If today there are 6,400 milligrams, how many milligrams were there yesterday?

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10

there is no question content here, but you for the free points! : d

12

step-by-step explanation:

a triangle's   full angle is 180 degrees so 180 - 156 = 24. 24/2=12