Calculate.89 + (-68)
A. -21
B. 157
C. -157
D. 21
Answer: D
Mathematics
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Simplify the expression. Write the result using positive exponents only.-5-4
A. 625
B. -625
C. 
D. - 
Mathematics
Divide and simplify.
÷ 
A. 
B. 
C. 
D. 
Mathematics
Simplify using the quotient-to-power rule.
9
A. 
B. x9y9
C. 
D. 
Mathematics
Find the y-intercept for the graph of the quadratic function.f(x) = 4x2 - 3x - 7
A. (0, 7)
B. (0, -7)
C. 
D. 
Mathematics