Divide and write the answer in the form a + bi. Let z = 7 - i and w = -1 + 6i. Find .

A.  -  i
B. -  -  i
C.  -  i
D. -  i


Answer: B

Mathematics

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The total number I of items that a factory can produce in an hour is proportional to the number N of employees.   ? A:  Using x to denote the constant of proportionality, write a formula that expresses the proportionality relationship. ? B:  Explain in practical terms what the constant of proportionality x means in this setting.

What will be an ideal response?

Mathematics

Calculate the arc length of the indicated portion of the curve r(t).r(t) = (10 + 2t2)i + (2t2 - 8)j + (5 - t2)k, -1 ? t ? 3

A. 24 B. 90 C. 72 D. 30

Mathematics

Use the inverse trig functions to express the angle in terms of the indicated unknown side. Express angle A in terms of b. Use one of the inverse trig functions tan-1, sin-1, or cos-1.

A. A = tan-1 
B. A = sin-1 
C. A = sin-1 
D. A = cos-1 

Mathematics

Solve by using the quadratic formula.q2 - q + 2 = 0

A. , -6
B. , 6
C. - , -6
D. - , 6

Mathematics