Solve the system by the method of substitution.
?
?
A. (-20, -40)
B. No solution
C. (20, 40)
D. 
E. 
Answer: B
Mathematics
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Solve the problem.A rotating beacon is located 15 ft from a wall. The distance from the beacon to the point on the wall where the beacon is aimed is given by a = 15
,where t is time measured in seconds since the beacon started rotating. Find a for 
Round your answer to the nearest hundredth.
A. 60.32 ft B. -17.12 ft C. 17.12 ft D. 38.72 ft
Mathematics
Provide an appropriate response.For what value of c does the quadratic function f(x) = 3x2 + 8x + c have exactly one x-intercept?
A. 16
B. 
C. 
D. - 
Mathematics
Find the domain of f. Write your answer in interval notation.f(x) = 
A. 
B. 
C. 
D. 
Mathematics
Perform the indicated operation and simplify.
- 
A. 
B. 
C. 
D. 
Mathematics