Use half-angle formulas to find the exact value for the following:
?
?
A. 
B. ?
C. ?
D. ?
E. ?
Answer: A
Mathematics
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Write the phrase as a mathematical expression. Use x as the variable.The difference of some number and 4.7
A. 4.7 B. x + 4.7 C. 4.7x D. x - 4.7
Mathematics
Simplify.5x + 9xy - 7y + 6x - 2y
A. - 11x - 9y - 9xy B. 11x - 5y + 9xy C. 11x - 9y + 9xy D. 11x + 9y + 9xy
Mathematics
Use a graphing utility to find the equation of the line of best fit. Round to two decimal places, if necessary.
A. y = 0.95x - 11.8 B. y = 1.05x + 11.8 C. y = 1.05x - 11.8 D. y = 0.95x + 11.8
Mathematics
Find the area of the circle. Use 3.14 or 
for ? as indicated.Use 
for ?.
A. 14
ft2
B. 53
ft2
C. 7
ft2
D. 17
ft2
Mathematics