Solve. Assume the exercise describes a linear relationship. When writing a linear equation, write the equation in slope-intercept form.Persons taking a 30-hour review course to prepare for a standardized exam average a score of 620 on that exam. Persons taking a 70-hour review course average a score of 788. Find a linear equation which fits this data.
A. y = 3.78x - 498
B. y = 3.78x + 498
C. y = 4.2x + 494
D. y = -4.2x + 494
Answer: C
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Solve the system of equations using the substitution method.
A. (-2, -7) B. (2, -7) C. (3, -7) D. (-7, 2)
Factor the trinomial completely.x5 + 2x4 - 15x3
A. x3(x - 5)(x + 3) B. x3(x + 5)(x - 3) C. (x4 + 5x3)(x - 3) D. (x2 - 5)(x3 + 3)
Find the relative extrema of the function and classify each as a maximum or minimum.f(x) = x4 - 18x2 + 2
A. Relative maximum: (3, -79); relative minimum: (-3, -79) B. Relative maximum: (0, 2); relative minima: (3, -79), (-3, -79) C. Relative minimum: (0, 2); relative maxima: (3, -79), (-3, -83) D. Relative maximum: (0, 2); relative minimum: (3, -79)
Find the circumference and area of the circle. Use 3.14 for ?. Round your results to the nearest tenth.
A. C ? 26.7 mi, A ? 106.8 mi2 B. C ? 53.4 mi, A ? 226.9 mi2 C. C ? 53.4 mi, A ? 53.4 mi2 D. C ? 26.7 mi, A ? 907.5 mi2