Solve the system of equations by the addition method.

A. (-5, -2)
B. (5, -2)
C. (-5, 2)
D. (5, 2)


Answer: B

Mathematics

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Write the expression in the standard form a + bi.

A.  i
B.  i
C.  i
D.  i

Mathematics

Find f(x) at the indicated value of x.f(x) = -4x2 - 5x + 10, x = 3

A. -41 B. -51 C. -17 D. -45

Mathematics

Solve the system of equations using matrices (row operations). If the system has no solution, say that it is inconsistent.

A. inconsistent
B. x =  - w, y = -  - w, z = 7 - w, where w is any real number
C. x = -  - w, y =  - w, z = 7 - w, where w is any real number
D. x = -  + w, y =  + w, z = 7 - w, where w is any real number

Mathematics

An equation with a restriction on x is given. This is the equation of the terminal side of an angle ? in standard position. Sketch the smallest positive such angle ?, and use your sketch to find the values of the indicated trigonometric functions. Rationalize denominators when applicable.8x + y = 0 , x ? 0Find tan ? and sec ?.

A. tan ? = - ; sec ? = - 
B. tan ? = -8; sec ? = 
C. tan ? = -8; sec ? = - 
D. tan ? = - ; sec ? = -8

Mathematics