Multiply.(1 - 3r)(1 + 3r)
A. 1 - 9r2
B. 1 - 6r - 9r2
C. 1 - 3r2
D. 1 + 6r - 9r2
Answer: A
Mathematics
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Solve the problem.For what values of t is r(t) = ti + 
j continuous?
A. {t ? ?: t ? -8}
B. {t ? ?: t ? 0 and t ? -8}
C. {t ? ?: t ? 0}
D. {t ? ?: t ? 0 and 
? 8}
Mathematics
Identify a, b, c, with a > 0, for the quadratic equation.4x2 = 10 - x
A. a = 4, b = -1, c = 10 B. a = 4, b = 1, c = -10 C. a = 4, b = 0, c = -10 D. Not quadratic
Mathematics
Evaluate the expression using the given value of the variables.(x + 4y)2 for x = 2, y = 2
A. 100 B. 10 C. 36 D. 20
Mathematics
Provide an appropriate response.Find a cofunction equivalent to csc 67°.
A. sin 67° B. sec 157° C. sec 23° D. sec 67°
Mathematics