First round each number to one non-zero digit. Then perform the calculation using the rounded numbers to obtain an estimate.8.3 + 3.5238 + 5.5395
A. estimate: 16
B. estimate: 17
C. estimate: 14
D. estimate: 18
Answer: D
Mathematics
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Write the expression as the sum or difference of multiples of logarithms.log2 
A. 7 log2 x - 2 log2 y - log2 6 B. 7 log2 x + 2 log2 y - log2 6 C. (log2 x)7 + ( log2 y)2 - log2 6 D. 7 log2 x + 2 log2 y + log2 6
Mathematics
Find the axis of symmetry of the quadratic function.f(x) = x2 + 10x - 7
A. x = 5 B. x = 10 C. x = -5 D. x = -32
Mathematics
Simplify. Be sure to rationalize the denominator. Assume that all variables represent positive real numbers.
A. 
B. 17
C. 
D. 8
Mathematics
Change the mixed number into an improper fraction.8
A. 
B. 
C. 
D. 
Mathematics