Solve the system of equations by substitution.5x + 3y = 802x + y = 30

A. (-10, 10)
B. (10, 0)
C. (10, 10)
D. (0, 10)


Answer: C

Mathematics

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A. cot ? - csc ? + C B. cot2 ? + csc ? + C C. csc2 ? - cot ? + C D. cot ? + csc ? + C

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Find all cube roots of the complex number. Leave answers in trigonometric form.125

A. 5 cis 90°, 5 cis 210°, 5 cis 330° B. 5 cis 0°, 5 cis 60°, 5 cis 120° C. 5 cis 45°, 5 cis 165°, 5 cis 325° D. 5 cis 0°, 5 cis 120°, 5 cis 240°

Mathematics

Subtract.53,125

A. 23,429 B. 23,469 C. 23,473 D. 32,473

Mathematics

Write the decimal as a percent. 0.9

A. 900% B. 90% C. 0.09% D. 0.9%

Mathematics