Add or subtract as indicated. Write your answer in the form a + bi.(5 + 7i) - (-8 + i)
A. -13 - 6i
B. -3 + 8i
C. 13 + 6i
D. 13 - 6i
Answer: C
Mathematics
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Express the number in scientific notation.0.000315
A. 3.15 × 10-3 B. 3.15 × 104 C. 3.15 × 10-4 D. 3.15 × 10-5
Mathematics
Using the factoring method, solve for the roots of the quadratic equation.6x2 + 25x + 21 = -4
A. x = 
, x = 
B. x = 
, x = 
C. x = - 
, x = - 
D. x = - 
, x = - 
Mathematics
Solve.Find the area of a triangular piece of cloth that is 4.8 m wide and 4.8 m tall.
A. 9.98 m2 B. 11.52 m2 C. 1.44 m2 D. 23.04 m2
Mathematics
Using either logarithms or a graphing calculator, find the time required for the initial amount to be at least equal to the final amount.$4700 deposited at 3.8% compounded monthly, to reach at least $13,200.
A. 27 years, 6 months B. 27 years, 1 month C. 27 years, 9 months D. 27 years, 3 months
Mathematics