4x + 5x + 12 = - 6 (given)

9x + 12 = - 6 (simplify)

9x = - 18 (subtraction)

x = - 2 (addition)

Which reason is incorrect?

Find the exact value of sin-1 (-square root 3/2). Write your answer in radians in terms of pi.

What is 22/2 x 7/3 what the answer as a fraction

V=2i + 9j Find ||9v||

The perimeter of a church window is 60 inches. If the window is in the shape of a regular pentagon, what is the length of each side of the window? A. 10 inches B. 6 inches C. 12 inches D. 8 inches

A team of workers took 167.3 hours to complete a task. A smaller team of workers will complete the same task, but it will take them 1.25 times as long as it took the first team.

Which fraction is equivalent to - 2/3 2/-3 -3/2 -2/3 2-3

The ages of five randomly chosen cars in a parking garage are determined to be 7, 9, 3, 4, and 6 years old. If one considers this sample of 5 in groups of 3, what is the probability of the population mean falling between 5.5 and 6.5 years?

A physician orders 0.5oz of magnesia and alumina oral suspension antacid 4 times per day for a client with indigestion. how many milliliters of the antacid is the client to ingest in a day?

What is the smallest number you can make with 5, 7, 9

Solve for x: 4|2x - 2| + 10 = 34.