Find the slope and the y-intercept of the given line.y = 3x - 5
A. -5, (0, 3)
B. 5, (0, 3)
C. 3, (0, -5)
D. 3, (0, 5)
Answer: C
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Find the cardinal number for the set.D = {x ? x ? N and 15 ? x ? 27}
A. n(D) = 42 B. n(D) = 11 C. n(D) = 13 D. n(D) = 43
What property of whole-number multiplication justifies the equality?(2 ? 6) ? 7 = 2 ? (6 ? 7)
A. Multiplicative-identity property B. Commutative property C. Distributive property D. Associative property
Solve the problem.Sybil is having her yard landscaped. She obtained an estimate from two landscaping companies. Company A gave an estimate of $180 for materials and equipment rental plus $60 per hour for labor. Company B gave an estimate of $230 for materials and equipment rental plus $50 per hour for labor. We can represent this situation with the system of linear equationsc = 180 + 60xCompany Ac = 230 + 50xCompany Bwhere c is the total cost and x is the number of hours of labor. Graph the system. What is the x-coordinate of the intersection point of the graphs? Describe what this x-coordinate means in practical terms.
A. 5; for 5 hours of labor, both companies charge the same. B. 8; for 8 hours of labor, both companies charge the same. C. 4; for 4 hours of labor, both companies charge the same. D. 4; there is a number of hours of labor, for which both companies charge $400.
Perform the indicated operations.(8x2 + 13x - 14) - (5x2 + 19x + 2)
A. 3x2 - 6x + 16 B. 3x2 - 6x - 12 C. 3x2 - 6x - 16 D. 3x2 + 18x - 12