assignment sheet-WA2_MAT-115-mar18.docx - MAT-115...

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Chapter 4 / Exercise 7
Intermediate Algebra
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MAT-115: INTERMEDIATE ALGEBRA Written Assignment 2 2.1: Use a General Strategy to Solve Linear Equations S olve the linear equation. 1. 3 ( x + 4 )= 24 3 ( x + 4 ) 3 = 24 3 X+4= 24 3 X+4=8 X=-4+8 X=4 2. 5 ( 2 n + 3 )= 25 5 ( 2 n + 3 ) 5 = 25 5 ¿ ¿ 2n+3)= 25 5 −(2 n )−1⋅3= 25 5 -2-3=5 -2n=8 - n 1 = 8 2 −(−1 n )= 8 2 n=-4 C lassify each equation as a conditional equation, an identity, or a contradiction. T hen, find the solution. 3. 2 ( 6 x 1 )= 3 ( 4 x + 8 ) contradiction Copyright © 2018 by Thomas Edison State University. All rights reserved.
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Chapter 4 / Exercise 7
Intermediate Algebra
Mckeague Expert Verified
2(6 x )+2⋅−1=3(4 x +8) 12 x −2=3(4 x +8) 12 x −2=3(4 x )+3⋅8 12 x −2=12 x +24 12 x −2−12 x =24 24=−2 No solution 4. 8 ( 3 x + 2 )= 28 x + 16 4 x 28 x +16−4 x =8(3 x +2) 24 x +16=8(3 x +2) 24 x +16=8(3 x )+8⋅2 24 x +16=24 x +16 24 x +16−24 x =16 16=16 Solve. 5. 3 4 x + 1 2 = 1 4 6. x + 1 2 = 3 4 , 1 4 X= 3 4 , 1 2 , 1 4 7. 0.8 x + 0.7 = 0.6 x 3.3 0.8 x +0.7−0.6 x =−3.3 0.2 x +0.7=−3.3 0.2 x =−0.7−3.3 0.2 x =−4 0.2 x 0.2 = 4 0.2 X= 4 0.2 X=-20 Copyright © 2018 by Thomas Edison State University. All rights reserved.
2.2: Use a Problem Solving Strategy Solve using a problem solving strategy. 8. Three-fifths of the people at a concert are children. If there are a total of 60 people at the concert, what is the total number of children at the concert? What is the total number of adults at the concert?
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