Given functions f and g, perform the indicated operations.f(x) = 5 - 5x,g(x) = -3x + 5Find f + g.
A. -8x + 10
B. 2x
C. -2x + 10
D. -3x + 5
Answer: A
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Determine whether the given number is approximate or exact.The blackboard in the mathematics classroom is 81 inches long.
A. Exact B. Approximate
Translate the problem to a system of equations, then solve using matrices.A merchant has coffee worth $30 a pound that she wishes to mix with 50 pounds of coffee worth $90 a pound to get a mixture that can be sold for $40 a pound. How many pounds of the $30 coffee should be used?
A. 250 lb B. 300 lb C. 125 lb D. 150 lb
Find all the factors for the number.42
A. 1, 2, 3, 6, 7, 14, 21, 42 B. 1, 7, 6, 42 C. 7, 6, 14, 42 D. 1, 2, 3, 6, 7, 14, 28, 42
Solve. Write the answer as a mixed number in simplest form.Find the perimeter of the triangle.
A. 93
ft
B. 21
ft
C. 21
ft
D. 21
ft