Write this word statement as an equation. Use x as the variable, and find all solutions from the set 
The product of a number and 7 is 21.
A. 7x = 21; 7
B. No Solution
C. 21x = 7; 3
D. 7x = 21; 3
Answer: D
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Use the rules for exponents to rewrite the expression and then evaluate the new expression. 42 ? 45
A. 262,144 B. 16,777,216 C. 16,384 D. 1,048,576
Solve.The formula for converting Fahrenheit temperatures to Celsius temperatures is 
Use this formula to solve the problem. In a certain city, the average temperature ranges from 
to 
Celsius. Find an inequality that represents the range of Fahrenheit temperatures. If necessary, round to the nearest tenth of a degree.
A. 16.4° ? F ? 27.6° B. -18.4° ? F ? 17.6° C. -82.4° ? F ? -46.4° D. -50.4° ? F ? -14.4°
Decide whether the given replacement value is a solution of the given equation.Is - 
a solution of 
x = - 
?
A. Yes B. No
Find the present value. Round to the nearest cent.To get $25,000 after 6 years at 10% compounded semiannually
A. $11,079.06 B. $14,616.98 C. $13,920.94 D. $14,111.85