Sample Work Assignment Algebra 1A
Chapter 4
You must show all work. No decimal answers.
Sketch a graph to represent the situation. Label each section.
1. The temperature changed as Nadia preheated the oven, baked the cookies, and turned the oven off.
For the table, determine whether the relationship is a function. Then represent the relationship using words, an equation, and a graph.
2.
x y
0 4
1 3
2 2
3 1
Write a function rule that represents each sentence.
3. 11 less than the product of a number y and -2 is z.
4. 5 less than the quotient of a number n and 4 is m.
Find the range of each function for the given domain.
5. f(x) = -2x + 1; {-6, -2, 0}
6. f(x) = x3 + 1; {-2, -1, 3}
Tell whether the sequence is arithmetic or not. If the sequence is arithmetic, write a function rule to represent it.
7. -19, -11, -3, 5, . . . . . .
8. Write a function rule for the area of a rectangle whose length is 5 in. more than its width. What is the area of the rectangle when its width is 8 in.?

What value of x is in the solution set of 4x – 12 s 16 + 8x?

Which of the following represents the factorization of the trinomial below? x^2+7x-30

(20 points) a bank has been receiving complaints from real estate agents that their customers have been waiting too long for mortgage confirmations. the bank prides itself on its mortgage application process and decides to investigate the claims. the bank manager takes a random sample of 20 customers whose mortgage applications have been processed in the last 6 months and finds the following wait times (in days): 5, 7, 22, 4, 12, 9, 9, 14, 3, 6, 5, 15, 10, 17, 12, 10, 9, 4, 10, 13 assume that the random variable x measures the number of days a customer waits for mortgage processing at this bank, and assume that x is normally distributed. 2a. find the sample mean of this data (x ě…). 2b. find the sample variance of x. find the variance of x ě…. for (c), (d), and (e), use the appropriate t-distribution 2c. find the 90% confidence interval for the population mean (îľ). 2d. test the hypothesis that îľ is equal to 7 at the 95% confidence level. (should you do a one-tailed or two-tailed test here? ) 2e. what is the approximate p-value of this hypothesis?