Write the expression in the standard form a + bi.Given w = 9 + 7i, evaluate w - 
.
A. -18 + 14i
B. 18
C. 14i
D. 0
Answer: C
Mathematics
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Solve.4x2 - 4y2 = 256 3x2 + y2 = 192
A. (-8, 0), (8, 0)
B. (0, -8), (0, 8)
C. (-8, -8
), (-8, 8
), (8, -8
), (8, 8
)
D. (-8, 8
), (8, 8
)
Mathematics
Write the number as a fraction. Do not simplify.0.648
A. 
B. 
C. 
D. 
Mathematics
Perform the indicated operation without the use of a calculator and express each answer in scientific notation.(9,000,000) × (70,000)
A. 6.3 × 1024 B. 6.3 × 1011 C. 6.3 × 1010 D. 6.3 × 102
Mathematics
Find the area of the figure.A square with a perimeter of 112 in.
A. 1568 in.2 B. 56 in.2 C. 784 in.2 D. 196 in.2
Mathematics