Solve the rational equation.
= 1 + 
A. 
B. {10, 9}
C. {-10, 9}
D. {10, -9}
Answer: C
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Solve the problem.An object is launched vertically in the air at 40 feet per second from a platform 50 feet above the ground. The height of the object above the ground (in feet) t seconds after launch is given by 
How long does it take the object to reach its maximum height? What is the object's maximum height?
A. 2.5 sec; 75 ft B. 1.25 sec; 50 ft C. 2.5 sec; 50 ft D. 1.25 sec; 75 ft
The sizes of two matrices are given. Find the size of the product AB and the size of the product BA, if the given product can be calculated.A is 1 × 3; B is 3 × 1.
A. AB is 1 × 1; BA cannot be calculated. B. AB is 1 × 1; BA is 3 × 3. C. AB is 3 × 3; BA is 1 × 1. D. AB cannot be calculated; BA is 3 × 3.
Solve the given equation by finding the unknown value.5 ? ? = 40
A. 200 B. 40 C. 8 D. 7
Solve.-19 ? 
? -11
A. 5 < x < 9 B. 5 < x ? 9 C. 5 ? x < 9 D. 5 ? x ? 9