Perform the indicated operation. Write the result in the form a + bi.(5 - 7i)(4 + 8i)
A. 76 - 12i
B. 76+ 12i
C. 68 - 36i
D. -36 - 68i
Answer: B
Mathematics
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I am saving money in a cookie jar. The amount of money 
, in dollars, in the jar after 
weeks is given by
.
?
By how much do my savings grow over a 8-week period?
A. $184.29
B. $184.00
C. $23.45
D. $23.00
Mathematics
Find the indicated term of the binomial expansion.(4x - 2y)9; 4th term
A. -2,752,512x6y3 B. -688,128x3y6 C. 1,376,256x6y4 D. 1,376,256x3y6
Mathematics
Write the system of linear equations that the augmented matrix represents.
A.
| 4x | + 2y | = -4 |
| -9x | - 6y | = 2 |
B.
| 2x | + 4y | = 4 |
| -9x | - 6y | = -2 |
C.
| 2x | + 4y | = -4 |
| -6x | - 9y | = 2 |
D.
| 2x | + 4y | = -4 |
| -9x | - 6y | = 2 |
Mathematics
Solve the equation.ln 15 + ln x = 0
A. 
B. 
C. 15
D. ?
Mathematics