Solve the problem.A plane makes a 240-mile trip against a head wind in 1 hour and 30 minutes and returns, with a tail wind of the same speed, in 1 hour. What is the speed of the wind?
A. 160 mph
B. 80 mph
C. 40 mph
D. 200 mph
Answer: C
Mathematics
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Find the standard form of the equation of the parabola using the information given.Focus: (2, 8); Directrix: y = 0
A. (y - 4)2 = 16(x - 2) B. (y - 2)2 = 16(x - 4) C. (x - 2)2 = 16(y - 4) D. (x - 4)2 = 16(y - 2)
Mathematics
Solve the equation first by clearing the fractions.
x - 
x = 3
A. -21 B. 24 C. -24 D. 21
Mathematics
Find 
. Write the answer in polar form with the argument between 0° and 360°z1 = 1 + i, z2 = 1 - 
i
A. 
(cos 105° + i sin 105°)
B. 
(cos 15° + i sin 15°)
C. 
(cos 105° + i sin 105°)
D. 
(cos 15° + i sin 15°)
Mathematics
Solve the problem.The area A of a rectangle is 
If the width W of the rectangle is 
find the length L of the rectangle when 
feet.
A. 22 ft B. 18 ft C. 28 ft D. 19 ft
Mathematics