Use the method of your choice to factor the trinomial, or state that the trinomial is prime.5x2 - 19x + 4
A. (5x - 1)(x + 4)
B. (5x + 1)(x - 4)
C. (5x - 4)(x + 1)
D. prime
Answer: D
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Find the y-intercepts for the parabola whose equation is given. If the y-intercepts are irrational, round your answers to the nearest tenth.y = x2 - 3
A. No y-intercept B. y-intercept (0, 1.7) C. y-intercept (0, -3) D. y-intercept (0, 3)
Multiply. Write the answer in simplest form.1
? 
A. 2
B. 
C. 1
D. 
Write a formula for the general term (the nth term) of the arithmetic sequence. Then use the formula for an to find a20, the 20th term of the sequence.a1 = -6, d = -0.9
A. an = -0.9n - 6; a20 = -24 B. an = -6n + 5.1; a20 = -114.9 C. an = -0.9n - 5.1; a20 = -23.1 D. an = -6n - 0.9; a20 = -120.9
Solve.A plane flying with a tailwind flew at a speed of 420 mph, relative to the ground. When flying against the tailwind, it flew at a speed of 300 mph. Express these relationships as equations. Let x represent the speed of the plane in calm air and let y represent the speed of the wind.
A. x + y = 420 y = 300 B. x + y = 300 x - y = 420 C. x + y = 300 y = 420 D. x + y = 420 x - y = 300