Write the expression in standard form. Do not use a calculator.8i - (7 + i)

A. -7 - 7i
B. 7i - 7
C. 9i - 7
D. -7 + 7i

Answer: D

Mathematics

Find the circumference of the circle. Use ? ? 3.14 and round to the nearest hundredth.diameter = 47 m

A. 147.58 m B. 6,936.26 m C. 295.16 m D. 73.79 m

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Mathematics

Determine the appropriate rotation formulas to use so that the new equation contains no xy-term.3x2 + 5xy + 3y2 - 8x + 8y = 0

A. x = -y' and y = x'
B. x = x' - y' and y = x' + y'
C. x = x' - y' and y = x' + y'
D. x = (x' - y') and y = (x' + y')

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Mathematics

Determine what type of number the solutions are and how many solutions exist.s2 + 3s - 4 = 0

A. Two rational B. One rational C. Two imaginary D. Two irrational

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Mathematics

Find the limit using = 1.

A. 4/5 B. 5/4 C. 0 D. Does not exist

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Mathematics