Give the degree measure of ?.? = cot-1 

A. 90°
B. 45°
C. 135°
D. 180°


Answer: C

Mathematics

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Use the quadratic formula to solve the equation. Give both exact and approximate answers.4m2 + 10m + 1 = 0

A. -0.052-1.198
B. -1.354-3.646 
C. -0.104-2.396 
D. ; 0.096, -2.596

Mathematics

Use a graphing utility to find the inverse, if it exists, of the matrix. Round answers to two decimal places.

A.  

B.  

C.

D.  

Mathematics

Solve.By switching service providers, a family's telephone bill decreased from about $50 a month to about $43. What was the percent of decrease?

A. 14%
B. 16.3%
C.

7%

D. 15%

Mathematics

Solve the problem.A painter can finish painting a house in 4 hours. Her assistant takes 6 hours to finish the same job. How long would it take for them to complete the job if they were working together?

A. 3 hr
B.  hr
C. 5 hr
D. 2 hr

Mathematics