Factoring Polynomials: Double Grouping — Cumulative exam Answers
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22
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How many intersections are there of the graphs of the equations below?x + 5y = 63x + 30y = 36
A
noneB
oneC
twoD
infinitely many23
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The resale value of a textbook decreases by 25% with each previous owner. A new textbook is sold for $85. Which function represents the resale value of the textbook after x owners?
A
f(x) = 85(1 – 0.25)xB
f(x) = 85(1 + 0.25)xC
f(x) = 85(0.25)xD
f(x) = (85 – 0.25)x24
Which shows all the values of x that make the rational expression undefined?
A
x = 6B
x = 7C
x = –6 or x = 6D
x = –7 or x = 725
Which number line shows the solution set for ?
A
A number line going from negative 5 to positive 4. Closed circles are at negative 5 and positive 1. Everything to the left of negative 5 and to the right of positive 1 is shaded.
B
A number line going from negative 5 to positive 4. Open circles are at negative 5 and positive 1. Everything to the left of negative 5 and to the right of positive 1 is shaded.
C
A number line going from negative 5 to positive 4. Closed circles are at negative 5 and positive 1. Everything between the points is shaded.
D
A number line going from negative 5 to positive 4. Open circles are at negative 5 and positive 1. Everything between the points is shaded.
26
Which graph shows the solution to the system of linear inequalities?2x – 3y <12y < –3
A
OptionB
OptionC
OptionD
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