Evaluate.Evaluate -a + b + (-5) for a = -20 and b = 10.
A. -15
B. 35
C. 15
D. 25
Answer: D
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Decide whether the statement is true or false.Regular polygons must have all equal sides but do not necessarily have to have all equal angles.
A. True B. False
Solve the problem.In a chemistry class, 8 L of a 4%-silver iodide solution are mixed with a 10%-silver iodide solution to get a 6% solution. How many liters of the 10% solution are needed?
A. 8.0 L B. 3.0 L C. 4.0 L D. 5.0 L
Multiply to find the exact answer. Express the answer as a whole or mixed number when possible and simplify.4 ? 3
? 
A. 2
B. 6
C. 1
D. 2
Translate into English sentence.19 = u - 10
A. Some number increased by ten is nineteen. B. Some number increased by nineteen is ten. C. Some number plus ten is nineteen. D. The difference of some number and ten is nineteen.