Page 402 - Algebra 1

e. Finance The cost of 5 books and 10 pencils is $36. The cost of 2 books (Ex 4) and 40 pencils is $18. How much do books cost and how much do
pencils cost?
Practice Distributed and Integrated
Solve.
1. -[-(-k)] -(-2)(-2 + k) = -k - (4k + 3)
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2. _1 + 5_1k + 3_2 = 0
(26) 3 3 9
3. Simplify √9 + √ 16 - √ 22 5.
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4. Give an example of a rational number that is not an integer. (1)
5. True or False: The number √ 49 is a rational number. (13)
*6. Solve by substitution: y = 3x - 5
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y = -2x + 15. *7. Solve by substitution: y = -8x + 21
(59)
y = -3x + 6.
*8. Write How do you know if a point is a solution to a system of equations?
(59)
*9. Multiple Choice Which ordered pair is a solution to the system of equations? (59)
4x + 9y = 75 8x + 6y = 66
A (3, 7)
B (0, 11)
C (10, 4)
D (12,-5)
*10. The sum of two numbers is 64. Their difference is 14. Find each of the
(59)
numbers.
11. Error Analysis Students were asked to find the product of 2b2(b3 + 4). Which
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student is correct? Explain the error.
Student A
2b2(b3 + 4) 2b2(b3) + 2b2(4) 2b5 + 8b2
Student B
2b2(b3 + 4) 2b2(b3) + 2b2(4) 2b6 + 8b2
Lesson 59 387