Solve the problem.Let f(x) = x2 + 3x - 21. Find a so that f(a) = 19.

A. {-8, -5}
B. {8, 5}
C. {-8, 5}
D. {8, -5}


Answer: C

Mathematics

You might also like to view...

Verify the identity.  = - 

What will be an ideal response?

Mathematics

Use Gauss-Jordan elimination to find the solution. Write the solution as an ordered triple.-5x - y + 8z = 28-4x + 7y - 2z = 35-9x - 5y + z = -39

A. (1, 7, 5) B. (-1, 5, 7) C. (1, 5, 7) D. (-1, 7, 2)

Mathematics

Solve the problem.The perimeter of a rectangle is 46 feet. Describe the possible lengths of a side if the area of the rectangle is to be greater than 120 square feet.

A. The length of the rectangle must lie between 8 and 15 ft B. The length of the rectangle must lie between 1 and 120 ft C. The length of the rectangle must be greater than 15 ft D. The length of the rectangle must be greater than 15 ft or less than 8 ft

Mathematics

Determine whether f is continuous at c.f(x) = ; c = 0

A. not continuous B. continuous

Mathematics