Solve the system of equations.49x2 + 4y2 = 196y - x = 7

A. , (2, 9)
B. , (7, 0)
C. , (3, 10)
D. , (0, 7)


Answer: D

Mathematics

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Find the simplified form for f(x) and list all restrictions on the domain.f(x) =  - 

A. f(x) = 10, x ? 2
B. f(x) = , x ? -2, 2
C. f(x) = 0, x ? -2, 0
D. f(x) = , x ? -2, 2

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The two figures are congruent. Find the measure of the requested side or angle.The length of 

A.  = 5
B.  = 10
C.  = 17.5
D.  = 12.5

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Find the exact value of the expression without using a calculator.sin  cos  + cos  sin 

A.
B.
C.
D. 1

Mathematics

Solve.The inmedance Z in an alternating current circuit (like the one used in your home and in your classroom) is given by the formula Z = , where V is the voltage and I is the current. Find the value of Z if  and 

A.  + 3i
B. -3 + i
C. 3 - i
D. -  - 3i

Mathematics