Solve the system of equations by substitution. x + y = 02x + 3y = -7
A. (-7, 7)
B. (-6, 6)
C. (6, -6)
D. (7, -7)
Answer: D
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For the given value of x, determine the value of y that gives a solution to the given linear equation in two unknowns.-5x + 8y = -25; x = -9
A. - 
B. - 
C. 
D. 
Evaluate the root, if possible.
A. 3 B. 5 C. -3 D. 9
Provide an appropriate response.Factor: x2 - 10x + 24
A. (x - 4)(x - 6) B. (x + 4)(x - 6) C. (x - 3)(x + 8) D. (x - 3)(x - 8)
Solve.The formula 
gives the distance d in feet that a projectile will travel when its launch angle is ? and its initial velocity is v0 feet per second. Approximately what initial velocity in miles per hour does it take to throw a javelin 340 feet with a launch angle 47°?
A. 178.89 miles per hour B. 153.17 miles per hour C. 104.43 miles per hour D. 308.92 miles per hour