Add. Use a number line only as a check.-13 + 13
A. -26
B. 1
C. 0
D. 26
Answer: C
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Solve for x.log2
= 4
A. 
B. 
C. 8
D. 16
Let 
. If x is increased by 4%, how is y affected? Round your answer to two decimal places if necessary.
?
A. y is increased by 2.04% B. y is increased by 1.22% C. y is increased by 22.24% D. ?y is increased by 21.67%
Translate the problem to a system of equations, then solve using Cramer's Rule.Two different gasohol mixtures are available. One contains 5% alcohol and the other 12% alcohol. How much of each should be mixed to obtain 500 gallons of gasohol containing 10% alcohol?
A. 208 gal 5%, 292 gal 12% B. 143 gal 5%, 357 gal 12% C. 357 gal 5%, 357 gal 12% D. 25 gal 5%, 60 gal 12%
Use a graphing utility to find the equation of the line of best fit. Round to two decimal places, if necessary.
A. y = 0.30x + 4.29 B. y = 0.32x + 4.29 C. y = 0.30x + 2.57 D. y = 0.32x + 2.57