For the quadratic equation, identify a, b, and c for use in the quadratic formula. Do not solve.7x2 + 1 = -4x - 5
A. a = 7, b = 4, c = 6
B. a = 7, b = 4, c = 1
C. a = 7, b = 4, c = -6
D. a = 7, b = -4, c = 5
Answer: A
Mathematics
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Evaluate the expression.-73
A. 21 B. -21 C. -343 D. 343
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Provide an appropriate response. Use the cosine function to find B of a standard right triangle ABC given a = 42 m and c = 76 m. Round to the nearest 0.1°.
A. 28.9° B. 33.5° C. 61.1° D. 56.5°
Mathematics
Factor completely, or state that the trinomial is prime.25x2 - 20x + 4
A. (5x - 2)2 B. (5x - 2)(5x + 2) C. (25x + 1)(x + 4) D. (5x + 2)2
Mathematics
Find the values of a, b, c, and d that make the matrix equation true.
= 
A. 
B. 
C. 
D. 
Mathematics