Pre Calculus Review

Solve the system by addition method. 3x+y=5 -x+2y=10

(0,5)

Find the exact value of the expression. Cos (240-15)

- √2/2

Use the given vectors to find the specified scalar. U=-7i+6j; V=3i-2j. Find u • v.

-33

Write the partial fraction decomposition of the rational expression. x/(x+3)(x+4)

4/(x+4)-3/(x+3)

Use the given vectors to find the specified scalar.U=3i+2j; V=-8i+4j. Find u+v

<-5,6>

Use the given vectors to find the specified scalar. U=7i-4j; V=3i+2j. Find U-V.

<4, -6>

Solve the triangle. A= 60, C= 50, c=7

B=70, a=7.9, b=8.6

Find the maximum. Objective function: z=3x+y. When points given (5,2),(2,3),(2,4).

Maximum: (5,2)= 17

Write an augmented matrix for the system of eauation: 3x+2y-3z=36 2y-3z=72 x+5y+7z=63

_ _ |3 2 -3 36 | |0 2 -3 72 | |1 5 7 63 |

Find the solutions of the equation. 2cosx-√2=0

π/4+2kπ 7π /4+2kπ