Page 158 - Algebra 1

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Simplify 3(2x + 5x) using the two different methods shown below. a. Combine like terms, and then multiply.
b. Distribute, and then combine like terms. Solve 0.45x - 0.002 = 8.098.
Justify If you multiply both sides of an equation by a constant c, what happens to the solution? Explain your answer.
StockMarket Aninvestorbuyssomestockat$6.57ashare.Shespends$846.25 which includes a transaction fee of $25. How many shares of stock did she buy?
Multiple Choice 0.8 is 0.32 of what number?
A 2.5 B 0.25 C 0.4 D 4
Verify Solve 0.45x + 0.9 = 1.008. Will both methods shown below result in the same solution? Verify by using both methods to solve.
Method I: Multiply both sides of the equation by 1000 first. Method II: Subtract 0.9 from both sides first.
Identify the coefficient, the variable(s), and the number of terms in the
expression _9 C + 32. 5
Verify Solve 0.25x + _1 = 0.075. Will both methods shown below result in the same solution? Explain. 2
Method I: First write the fraction as a decimal. Method II: First write the decimals as fractions.
Error Analysis Two students use the circle graph to find the total percent of students who have fewer than two siblings. Which student is correct? Explain the error.
Students’ Siblings
0 siblings 8
2 siblings 6
1 sibling 12
3 siblings 4
Student A
0 siblings or 1 sibling = 20 20% of the students
Student B
Total students:
8 + 12 + 6 + 4 = 30
0 siblings or 1 sibling = 20
_
20 ≈ 67% of the students 30
3 4 *11. (22)
Measurement The graph shows an estimation of the changes in the diameter of a tree, in inches, every 20 years. What was the approximate circumference of the tree when the tree was 100 years old? Use 3.14 for π. Round the answer to the nearest tenth.
Growth of Tree
30 20 10
0
1 20 40 60 80 100 120
Years
Lesson 24 143
Diameter (in.)