Solve the radical equation, and check all proposed solutions.
= x - 5
A. {-7}
B. {7}
C. {4, 7}
D. {4}
Answer: B
Mathematics
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Mathematics
Two planes leave an airport at the same time. Their speeds are 140 miles per hour and 150 miles per hour, and the angle between their courses is 38°. How far apart are they after 1.5 hours? ? Apply the rules regarding the use of significant digits after all computations are complete. ?
A. 182 mi B. 140 mi C. 150 mi D. 120 mi E. 112 mi
Mathematics
Solve the system by substitution.x + 6y = 132x + 12y = 14
A. (1, 2) B. (1, 1) C. (2, 2) D. No solution
Mathematics
For f(x) = A sin 
+ D,identify either A, B, C, or D as indicated for the sine function.y= -2 sin 
Find B.
A. ? B. 2 C. 2? D. 4
Mathematics