Solve the system using substitution.
A. (4, 4)
B. no solution
C. (5, 4)
D. (5, 3)
Answer: D
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For the given pair of variables determine whether a is a function of b, b is a function of a, both, or neither.a is the savings account number of a customer at a bank, and b is the number of years the account has been active.
A. b is a function of a B. Both C. Neither D. a is a function of b
Use the addition property of equality to solve the equation.x + 19 = 16
A. 35 B. 3 C. -3 D. -35
Use a calculator to find the approximate value. Express your answer in degrees rounded to two decimal places.cos-1(-0.9397)
A. -20° B. 157° C. 160° D. 162°
Find any relative extrema.f(x, y) = x3 + y3 - 9xy
A. f(1, 1) = -7, relative minimum B. f(2, 2) = -20, relative minimum C. No relative extrema D. f(3, 3) = -27, relative minimum