Determine if the lines represented by the equations and are parallel, perpendicular, neither, or both?
a. Perpendicular
b. Parallel
c. Neither
d. Both perpendicular and parallel
a. Perpendicular
The lines represented by the equations and are perpendicular.
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Determine if the given polar coordinates represent the same point.(3, ?/3), (-3, -2?/3)
A. No B. Yes
Find the domain of the expression.
?
?
A. All real numbers x such that x ? 2 B. All nonnegative real numbers x C. All real numbers x such that x > 3 D. All nonnegative real numbers x such that x ? 3 E. All negative real numbers x
Solve. If needed, round money amounts to two decimal places and all other amounts to one decimal place.The manager of a coffee shop has one type of coffee that sells for $7 per pound and another type that sells for $15 per pound. The manager wishes to mix 60 pounds of the $15 coffee to get a mixture that will sell for $9 per pound. How many pounds of the $7 coffee should be used?
A. 240 pounds B. 120 pounds C. 180 pounds D. 90 pounds
Express the number in scientific notation.0.000055711
A. 5.5711 × 10-4 B. 5.5711 × 105 C. 5.5711 × 104 D. 5.5711 × 10-5