Solve the system of equations by the substitution method.
A. no solution
B. (-8, -1)
C. (-7, -2)
D. (7, -1)
Answer: C
Mathematics
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Translate the phrase into a mathematical expression and then find the result.482 cell phone calls times 7
A. 482 ? 7; 3374 cell phone calls B. 482 ÷ 7; 3274 cell phone calls C. 482 ÷ 7; 3474 cell phone calls D. 482 ? 7; 3384 cell phone calls
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Graph the polar equation.r = -4 sin ?
A. 
B. 
C. 
D. 
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Solve the exponential equation. Use a calculator to obtain a decimal approximation, correct to two decimal places, for the solution.3 x + 6 = 5
A. {-0.56} B. {1.46} C. {-4.54} D. {6.68}
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Find all real solutions to the equation.x1/3 = 5
A. ? B. {15} C. {243} D. {125}
Mathematics