Solve using the principle of zero products.Given that f(x) = 9x(5x + 25), find all values of a for which f(a) = 0.
A. 0, 
B. 0, 5
C. 0, - 
D. 0, -5
Answer: D
Mathematics
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Write the expression in the standard form a + bi.
A. -1 + 2i B. -1 - 2i C. 1 + 2i D. -1 + 5i
Mathematics
Solve the problem.Let angle POQ be designated ?. Angles PQR and VRQ are right angles. If ? = 31°, find the length of OU accurate to four decimal places. 
A. 1.1666 B. 0.8572 C. 1.9416 D. 0.5150
Mathematics
Provide an appropriate response.The monetary system of the United States is based on:
A. fractions B. whole numbers C. decimals D. Roman numerals
Mathematics
Find the average rate of change for the function between the given values.f(x) = x2 + 3x; from 2 to 8
A. 13
B. 
C. 11
D. 
Mathematics