Use a sum-to-product identity to rewrite the expression.cos (7y2 - 10) + cos (4y2 - 4)
A. - 2
B. 2
C. 2
D. 2
Answer: B
Mathematics
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Multiply.(3p + 7q)(3p - 7q)(9p2 + 49q2)
A. 27p3 + 189p2q + 441pq2 + 343q3 B. 27p3 - 189p2q - 441pq2 + 343q3 C. 81p4 + 2401q4 D. 81p4 - 2401q4
Mathematics
Solve.Find the weight of the piece of steel pictured. Steel weights 0.2833 pounds per cubic inch. Round to the nearest hundredth.
Fill in the blank(s) with the appropriate word(s).
Mathematics
Find 
.ln y = ey cos 8x
A. ey cos 8x - 8ey sin 8x
B. 
C. 
D. -8yey sin 8x
Mathematics
Solve. Write a mixed numeral for the answer.At a track and field event, an athlete recorded the following heights at the high jump: 84
in., 83
in.,
and 85 in. Find the average of the four jumps.
A. 84
in.
B. 84
in.
C. 84
in.
D. 84 in.
Mathematics