Find the exact value of the expression using a sum or difference identity.cos (-165°)
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Find the equation of the parabola satisfying the given conditions. The vertex is at the origin.Focus (-7, 0)
A. y = - 
x2
B. x2 = -28y
C. y2 = -28x
D. y = -28x2
Mathematics
Use the Negative Exponent Rules to simplify. Write the answer with positive exponents. All variables are nonzero.
-1
A. -3
B. 3
C. 
D. - 
Mathematics
Write a mathematical expression for the word phrase.12.57 divided by -5
A. 12.57 ÷ 5
B. 
C. 
D. 12.57(-5)
Mathematics
If possible, solve each system by an algebraic method (substitution or addition method). Otherwise, state that the problem has no solution or an infinite number of solutions. y - 3x = 43y = 9x + 12
A. Infinite number of solutions B. (-1.5, -1) C. No solution D. (1, 1)
Mathematics