If the line passing through the points (a, 1) and (5, 7) is parallel to the line passing through the points (1, 6) and (a + 1,3), what is the value of a?
?
a = __________
Fill in the blank(s) with the appropriate word(s).
-5
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Without graphing, find the maximum value or minimum value.f(x) = 
(x + 5)2 - 5
A. 6 B. 4 C. -5 D. 5
Divide. If the division is not possible, write "undefined."
A. 9472 B. 9472 R2 C. 9472 R3 D. 9471 R7
Factor the trinomial, or state that the trinomial is prime.9x2 + 18xt + 8t2
A. prime B. (9x + 2t)(x + 4t) C. (3x - 2t)(3x - 4t) D. (3x + 2t)(3x + 4t)
Marijuana use Suppose the percent of U.S. high school seniors from 1975 to 2001 who used marijuana can be modeled by  figure 1.png)
where x is the number of years past 1975. Choose the correct interpretation the slope in this equation as a rate of change. Round your answer to three decimal places, if necessary.
a. The percentage of U.S. high school seniors who used marijuana increased at a rate of 0.198% per year. b. The percentage of U.S. high school seniors who used marijuana decreased at a rate of 19.8% per year. c. The percentage of U.S. high school seniors who used marijuana decreased at a rate of 0.198% per year. d. The percentage of U.S. high school seniors who used marijuana increased at a rate of 19.8% per year. e. The percentage of U.S. high school seniors who used marijuana decreased at a rate of 1.98% per year.