Find the angle between vectors v and w. Round the answer to the nearest tenth of a degree.v = 8i + 4j,  w = -7i + 7j

A. 120.5°
B. 108.4°
C. 161.6°
D. 109.4°


Answer: B

Mathematics

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Express the integrand as a sum of partial fractions and evaluate the integral. dx

A. ln   +   ln   + tan-1   + C
B. 4 ln   -   ln   - tan-1 x + C
C. 4 ln  +  ln  +  tan-1  + C
D. 4 ln   +   ln   + sin-1   + C

Mathematics

Provide an appropriate response. Find the distance between the points (1, -2) and (-5, -6).

A. 7.211 B. 10 C. 4.472 D. 8.944

Mathematics

Find the solution.4x + 9 = 25

A. 6 B. 5 C. 3 D. 4

Mathematics

Simplify. Assume that all radicands are nonnegative.2 ( - )

A. 4 sin ? (1 + 39)
B. 4 cos ?  + 3 sin2 ?
C. 3 cos2 ?  + 2 sin ?
D. 4 sin ? (1 - 3 )

Mathematics