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Aufmann et al-Intermed. Algebra: Applied Approach (Homework)

James Finch

Math - Developmental, section A, Fall 2019

Instructor: Dr. Friendly

Current Score : 3 / 6

Due : Monday, December 30, 2030 23:59 EST

Last Saved : n/a Saving...  ()

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–/1 –/1 –/1 –/1 –/1 –/1
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3/6 (50.0%)

  • Instructions

    Here are some textbook questions from Intermediate Algebra: An Applied Approach, Student Support 7/e by Richard N. Aufmann, Vernon C. Barker, Joanne S. Lockwood published by Brooks/Cole. Click here for a list of all of the questions coded in WebAssign. This demo assignment allows many submissions and allows you to try another version of the same question for practice wherever the problem has randomized values.

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1. –/1 points AufInterAlg7 1.1.002. My Notes
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Classify the following numbers. (Select all that apply.)
-2.020020002... 11/92 6.53 1/π 0.233 -15
(a) integers
(b) rational numbers
(c) irrational numbers
(d) real numbers

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2. –/1 points AufInterAlg7 1.2.028.SBS. My Notes
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Simplify.
2 – (–4) + (–6) – 11
STEP 1: Rewrite the subtractions as addition.
2 + + (–6) + (–11)

STEP 2: Add the first two terms.
+ (–6) + (–11)

STEP 3: Add the next term.
+ (–11)

STEP 4: Add the remaining term.

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3. –/1 points AufInterAlg7 2.4.006. My Notes
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Solve. Write the solution in set-builder notation and graph the solution set.
x + 9 ≥ 8
{x | x }

Use the tools to enter your answer.
Created with Raphaël 2.1.0-10-8-6-4-20246810
Created with Raphaël 2.1.0

NO SOLUTION

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4. –/1 points AufInterAlg7 3.5.076. My Notes
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A jogger running at 8 mph burns approximately 12 calories per minute.
(a) Write a linear equation for the number of calories (y) burned by the jogger in terms of the number of minutes run (x).


(b) Use your equation to find the number of calories burned after jogging for 33 min.
calories

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5. –/1 points AufInterAlg7 4.4.011.SBS. My Notes
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A coin bank contains only nickels and dimes. The total value of the coins in the bank is $2.80. If the nickels were dimes and the dimes were nickels, the total value of the coins would be $3.50. Find the number of nickels in the bank.

STEP 1: Let the number of nickels in the bank be n. Let the number of dimes in the bank be d.
Coin    Number    Value    Total Value
nickeln5
dimed10

STEP 2: Now determine the value if the nickels were dimes and the dimes were nickels.
Coin    Number    Value    Total Value
nickel 5
dime 10

STEP 3: Write the information as a system of equations.
=280
10n + 5d=

STEP 4: Solve for n by eliminating d.
–1(5n + 10d)=
2(10n + 5d)=
15n=
n=
Click here for help with symbolic formatting.

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6. –/1 points AufInterAlg7 11.1.007. My Notes
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Find the vertex and the axis of symmetry given by x = y2 − 10y + 19.
vertex ( , )
axis of symmetry

Graph x = y2 − 10y + 19.
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