Use a reciprocal identity to find the indicated trigonometric function of ?.tan ? if cot ? = - 
A. - 
B. 
C. - 
D. 
Answer: A
Mathematics
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Subtract. Combine like terms, and write the answer in descending order.(7z + 5z2 + 6) - (10z2 - 1)
A. -5z2 + 8z + 6 B. 15z2 + 7z + 5 C. -5z2 + 7z + 7 D. 15z2 + 8z + 6
Mathematics
Find the mass of the wire that lies along the curve r and has density ?.C1: r(t) = (3 cos t)i + (3 sin t)j, 0 ? t ? 
;C2: r(t) = 3j + tk, 0 ? t ? 1; ? = 3t3
A. 
units
B. 
units
C. 
?3 units
D. 
?3 units
Mathematics
Solve.Karen went shopping for holiday presents for her family. She spent $259 on Monday, $142 on Tuesday, and $150 on Wednesday. What is the total amount of money that she spent on gifts?
A. $541 B. $651 C. $441 D. $551
Mathematics
Divide. Write the answer in simplest form.
÷ 0
A. Undefined
B. 0
C. 
D. 3
Mathematics