Find the vertex of the parabola.3x2 + 30x - y + 74 = 0
A. 
B. 
C. (-5, -1)
D. 
Answer: C
Mathematics
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Find the exact value of the expression.sin 20° cos 100° + cos 20° sin 100°
A. 
B. 
C. - 
D. - 
Mathematics
Solve.-5 = z - 7.9
A. 12.9 B. -12.9 C. 2.9 D. -2.9
Mathematics
Use a calculator to solve the equation on the interval 0 ? ? < 2?. Round the answer to two decimal places.5 tan ? - 3 = 0
A. 0.54, 3.68 B. 0.54, 2.60 C. 1.03, 4.17 D. 0.54, 5.74
Mathematics
Write the improper fraction as a mixed or whole number.
A. 4
B. 30
C. 30
D. 
Mathematics