Write the interval as an inequality involving x, and illustrate the inequality using the real number line.[-7, 4]
A. -7 ? x < 4
B. -7 ? x ? 4
C. -7 < x ? 4
D. -7 < x < 4
Answer: B
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Find an equation of the secant line containing (1, f(1)) and (2, f(2)).f(x) = x3 + x
A. y = -8x - 6 B. y = 8x + 6 C. y = 8x - 6 D. y = -8x + 6
Solve the problem.A rumor is spreading across a college campus that there will be no final exams for any classes this semester. At 8 a.m. today, 7 people have heard the rumor. Assume that after each hour, 3 times as many students have heard the rumor. So, for example, 21 people will have heard the rumor by 9 a.m. Let f(t) represent the number of people who have heard the rumor t hours after 8 a.m.i) Find an equation for f.ii) Use f to predict the number of students who will have heard the rumor by 2 p.m.
What will be an ideal response?
The number line in the following graphic represents fictional net exports in billions of dollars for five countries. Net exports are obtained by subtracting total imports from total exports; a negative net export means the country imported more goods than it exported.
Germany's net exports are represented by a positive integer. Explain what this tells you about imports and exports of Germany.
A. Germany's exports exceed imports by 35 billion dollars. B. Germany's imports exceed exports by 35 billion dollars. C. Germany's total imports are 35 billion dollars. D. Germany's total exports are 35 billion dollars.
Factor completely. If the polynomial cannot be factored, say it is prime.x2 - 64
A. (x + 64)(x - 64) B. (x - 8)(x - 8) C. (x2 + 8)(x2 - 8) D. (x + 8)(x - 8)