Write an algebraic expression for the quantity. Let x represent the unknown value.Eight fewer than a number.
A. x - 8
B. 8 < x
C. x < 8
D. 8 - x
Answer: A
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Determine whether the statement is true or false.Every real number is represented by a point on a number line.
A. True B. False
Solve using a system of two equations in two unknowns.The manager of a bulk foods establishment sells a trail mix for $7 per pound and premium cashews for $15 per pound. The manager wishes to make a 120-pound 
mixture that will sell for $9 per pound. How many pounds of each should be used?
A. 60 lb of trail mix, 60 lb of cashews B. 75 lb of trail mix, 45 lb of cashews C. 90 lb of trail mix, 30 lb of cashews D. 30 lb of trail mix, 90 lb of cashews
Find the requested characteristic.Find the period of y = - tan 
.
A. - 
B. 
C. 2?
D. 
Approximate the area under the curve and above the x-axis using n rectangles. Use left endpoints.f(x) = x2 - 3x + 4 from x = 1 to x = 5; n = 4
A. 20 B. 28 C. 30 D. 16