Solve the system of equations by substitution.
A. x = 0, y = 1; (0, 1)
B. x = 0, y = 0; (0, 0)
C. x = 1, y = 0; (1, 0)
D. x = 1, y = 1; (1, 1)
Answer: A
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Find the value of each square root by use of a calculator. Each number is approximate.
+ 
A. 4.7506 B. 6.5863 C. 4.75060 D. 6.58630
Answer the question according to what the textbook states.Which of these is NOT listed as a tip to help you succeed in this course?
A. Know how to get help if you need it. B. Choose to attend all class periods and do your homework. C. Read your textbook after you attend class. D. Form study groups and/or exchange names and e-mail addresses.
Use the formula for the general term (the nth term) of a geometric sequence to find the indicated term of the sequence with the given first term, a1, and common ratio, r.Find a11 when a1 = -5, r = 2.
A. -5120 B. 15 C. -10,240 D. -5116
Find the focus and directrix of the parabola.y2 = 16x
A. F: (4, 0); D: x = -4 B. F: (4, 0); D: x = 4 C. F: (0, 4); D: y = -4 D. F: (4, 4); D: x = 4