Solve: 7-4(x-1) = 20 step 1: 7-4x + 1 = 20 step 2: 8-4x = 20. step 3: (-1/4) -4x = 12 (-1/4)step 4: x=-3 which is the first incorrect step in the solution shown above a. step 3 b. step 4 c. step 1 d. step 2

Zoe placed colored blocks on a scale in science class. each block weighed 0.8 ounces. the total weight of all the colored blocks was 12.8 ounces. how many blocks did zoe place on the scale? write and solve an equation to find the answer.

Which is the completely factored from of xy^3-x^3y

25 ! the line of best fit is h = 5a + 86. predict the height at age 16. show your work.