Solve the system by the elimination method. x + 5y = -7 4x + 6y = -28
A. {(-6, -7)}
B. {(-6, -1)}
C. {(-7, 0)}
D. ?
Answer: C
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Factor completely the polynomial. Indicate any that are not factorable using integers.a 2 - 4a + 21
A. (a - 3)(a + 7) B. (a + 3)(a - 7) C. (a - 3)(a - 7) D. (a + 3)(a + 7) E. not factorable
Solve the inequality numerically. Approximate endpoints to the nearest tenth.2.9
+ 1.5x ? 2
A. x ? 1.7 B. x ? -1.9 C. x ? 1.9 D. x ? -1.7
Solve the problem.The sum of two numbers is 29 and their difference is 1. Find the numbers.
A. 13 and 16 B. 29 and 0 C. 16 and 17 D. 15 and 14
Find all values of ? if ? is in the indicated interval and has the given function value. Give approximations to as many decimal places as your calculator displays.tan ? = 0.9124156; ? in the interval [0°, 360°)
A. 42.3778124°, 317.622188° B. 47.6221876°, 132.377812° C. 42.3778124°, 137.622188° D. 42.3778124°, 222.377812°