Can someone explain. i don't understand.

how many solutions does the equation −5a + 5a + 9 = 8 have?

none
one
two
infinitely many

How to use order of operation in 20 divide by 4 multiply 5 = 1

Select 2 statements that are true about the equation y+6=-10(x-3).1) the slope of the line is -102) the slope of the line is 33) one point on the line is (3,6)4) one point on the line is (3,-6)

Use the quadratic formula to solve the equation. if necessary, round to the nearest hundredth. x^2 - 8 = -6x a. –7.12, 1.12 b. 7.12, –1.12 c. 7.12, 1.12 d. –7.12, –1.12