Solve by substitution.4x + y = 0x = 
y + 2
A. (-1, 4)
B. (1, 8)
C. No solution
D. (1, -4)
Answer: D
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Solve the problem.Find the total cost of 1.3 pounds of rice at $0.26 per pound, 1.2 pounds of sugar at 
per pound, and 2.3 pounds of cereal at $0.26 per pound.
A. $1.16 B. $1.39 C. $0.60 D. $0.93
Write the given number in scientific notation.430,000
A. 4.3 × 106 B. 4.3 × 10-5 C. 4.3 × 10-6 D. 4.3 × 105
Solve the problem.Find the missing length in the following right triangle. If necessary, round to the nearest tenth. 
A. 12 cm B. 14.5 cm C. 72.5 cm D. 145 cm
Special products can be illustrated by using areas of rectangles. Use the figure to justify the special product 
What is the sum of the monomials of the black, white, and gray rectangles?
A. a2 + 2ab + b2 B. 2a2 + b2 C. a2 + 2b2 D. 2a + 2ab + b2