Use a calculator to find the acute angle between the planes to the nearest thousandth of a radian.-2x - 3y - 10z = 9 and 2x + 9y - 5z = 4
A. 1.327 rad
B. 1.4 rad
C. 1.436 rad
D. 0.171 rad
Answer: B
Mathematics
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Sketch the line.-5x + y = 0
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.Arches in the shapes of parabolas are often used in construction. Find the equation of a parabolic arc that is 20 feet high at its highest point and 22 feet wide at the base, as illustrated in the figure. Place the origin at the midpoint of the base.
A. y = - 
x2 + 20
B. y = -x2 + 22
C. y = -x2 + 20
D. y = 
x2 + 20
Mathematics
Solve and check.
+ 
= 
A. x = -7 B. No solution C. x = 6 D. x = 0
Mathematics
Write the first four terms of the geometric sequence.a =3, a5 = 48
A. 48, 24, 12, 6 B. 6, 12, 24, 48 C. 3, 6, 12, 24 D. 24, 12, 6, 3
Mathematics