Write the mathematical expression as a phrase.9x + 5
A. 5 more than 9 times x
B. the product of 9 and the sum of x and 5
C. 5 less than 9 times x
D. 9 times the sum of x and 5
Answer: A
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Solve the problems.A race car driver's speed is clocked at 141.483 mph at the end of his first lap, and at 170.798 mph at the end of the next lap. How much faster was he driving at the end of the second lap than at the end of the first?
A. 30.315 mph B. 29.325 mph C. 29.215 mph D. 29.315 mph
Translate the following into an equation where x represents the unknown number. Then solve the equation for x.
times a number is 8.
A. 5x = 8, x = 12
B. 5x = 8, x = 
C. 
x = 8, x = 40
D. 
x = 8, x = 1
Solve the problem.The half-life of a radioactive element is 130 days, but your sample will not be useful to you after 80% of the radioactive nuclei originally present have disintegrated. About how many days can you use the sample?
A. 312 B. 287 C. 302 D. 297
Use the properties of equality to solve the equation.x - 
= - 
A. 
B. 
C. - 
D. - 