Differentiate.
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Without graphing, determine whether the graph of the quadratic function opens up or opens down. Also, determine of the graph will be wider or narrower than the graph of y = x2.f(x) = - 
x2 + 5x - 2
A. up, wider B. down, narrower C. up, narrower D. down, wider
Find the missing length in the right triangle.
?20 in.
A. 27 in. B. 360 in. C. 720 in. D. 19 in.
Solve. Where appropriate, include approximations to the nearest thousandth. If no solution exists, state this.ln (x - 3) + ln (x + 5) = ln 20
A. -7, 5 B. -5, 7 C. 7 D. 5
Solve the problem.There are 30 students in Ms. Roth's preschool class. All of of the students own either cats or dogs, and some have both cats and dogs. If 18 of the students own dogs and 22 own cats, how many own both cats and dogs?
A. 10 B. 12 C. 8 D. 20