Indicate what must be done to each side of the equation in order to isolate the variable.- 
x = -3
A. Multiply by 
B. Multiply by 9
C. Multiply by - 3
D. Divide by -3
Answer: C
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Transform the equation to a form without an xy-term by a rotation of axes. Graph the curve.24xy - 7y2 + 36 = 0
A. 
B. 
C. 
D. 
Use the distributive property to multiply. Then, if possible, simplify the resulting expression.3(7 + m)
A. 21m B. 21 + m C. 21 + 7m D. 21 + 3m
Solve the problem.A tunnel is to be dug from point A to point B. Both A and B are visible from point C. If AC is 235 miles and BC is 625 miles, and if angle C is 90°, find the measure of angle B. Round your answer to the tenths place.
A. 34.1° B. 18.7° C. 31.4° D. 20.6°
Translate the problem to a system of equations, then solve using matrices.Mardi received an inheritance of $70,000. She invested part at 10% and deposited the remainder in tax-free bonds at 8%. Her total annual income from the investments was $6400. Find the amount invested at 10%.
A. $63,600 B. $20,000 C. $40,000 D. $39,000