How is the equation for the four 9s

2a² - a - 13 = 2 I want to see the steps how its done

Lines m and n are parallel. Parallel lines m and n are cut by transversals s and t. Clockwise from top left, the angles formed by m and t are blank, blank, (5 x minus 1) degrees, blank; formed by m and s are blank, (9 x + 2) degrees, blank, 1;

If the function 5x+y=1 has the domain (-2, 1, 6), then what is the corresponding range? OA. (-9,6, 31} B. (9,-6, - 31) C. (-11, 4, 29) OD. (11,-4,-29)

Evaluate the following expression for w=4. w^-3 =

Use the formula to evaluate the series 3-9+27-81 + ... - a8

Amy got a $1,000 loan from her bank, and she had to repay $1,550. What are the principal and interest amounts in this transaction?

What is 8/9 as a decimal rounded to nearest thousandth

What is the mean cost of replacing brake pads for four different vehicles ai at the following prices $120,$235,$98,$142

If f (x) = 1/2 [x], what is f (7.6) •3 •3.5 •3.8 •4

8 people are about to board a plane. In how many ways can this be done?