Build a variable expression for the given phrase.Two times a number, increased by 21
A. 2x + 21
B. 2 ? 21 + x
C. 2x
D. 2(x + 21)
Answer: A
You might also like to view...
Using Green's Theorem, compute the counterclockwise circulation of F around the closed curve C.F = (x2 + y2)i + (x - y)j; C is the rectangle with vertices at (0, 0), (7, 0), (7, 7), and (0, 7)
A. 0 B. 294 C. 392 D. -294
Use a calculator to approximate the root to the nearest thousandth.- 
A. -9.899 B. -98.000 C. -9.896 D. -9.904
Solve. Remember to insert units when writing your answer.In November, 10 tons 1037 lb of coal were delivered to a steel mill. In December, 6 tons 1715 lb were delivered. Find the total amount of coal delivered in these two months.
A. 16 tons 752 lb B. 17 tons 752 lb C. 3 tons 1322 lb D. 4 tons 1322 lb
Solve the problem.Find a polynomial that represents the area of the shaded region.
A. 3x2 + 2x + 3 B. 3x2 + 3 - 2x C. 3x2 + 4x - 3 D. 3x2 + 4x + 3