Solve the problem.A plane flies 440 miles with the wind and 340 miles against the wind in the same length of time. If the speed of the wind is 20 mph, what is the speed of the plane in still air?
A. 181 mph
B. 156 mph
C. 146 mph
D. 161 mph
Answer: B
Mathematics
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Evaluate the given definite integral.
?
?
A. 
B. 
C. 
D. 
Mathematics
Let (m × n) denote a matrix of size m × n. Find the size of the following product, or state that the product is not defined.(4 × 4)(4 × 4)
A. 4 × 4 B. not defined C. 4 × 8 D. 8 × 4
Mathematics
Solve.The fraction of students who do not have dental insurance coverage is 
. Write this fraction as a decimal.
A. 0.656 B. 0.736 C. 1.524 D. 0.696
Mathematics
Use the quadratic formula to solve the equation.5x2 + 12x = - 6
A. 
, 
B. 
, 
C. 
, 
D. 
, 
Mathematics