Concept explainers
a.
To state: the equation of the model .
a.
Answer to Problem 50PPS
The equation is
Explanation of Solution
Given information:
The students spent
Formula used:
A linear function is a function with ordered pairs that satisfy a linear equation . The equation can be written in the form
Calculation:
According to the model ,
Money spent by students on supplies be
Money charged per car wash be
Let the money charged be x , implies 2x
Let the raised money be y is equal to the money charged minus the money spent.
Hence, the function is
b.
To graph: The equation
b.
Explanation of Solution
Given information:
The equation
Graph:
Figure 1.
Interpretation:
The linear equation
The x -intercept is at 5 and y -intercept is at -10.
c.
To calculate: the money earned after 20 car wash.
c.
Answer to Problem 50PPS
The money earned is
Explanation of Solution
Given information:
Formula used:
Dependent variable and Independent variable: x is independent variable whereas y is dependent variable because the value of y depends on value of x .
Calculation:
Consider ,
The equation is linear.
We have
Thus, the money earned is
d.
To calculate: the number of cars washed to earn
d.
Answer to Problem 50PPS
The number of cars are 55.
Explanation of Solution
Given information:
Formula used:
Dependent variable and Independent variable: y is independent variable whereas x is dependent variable because the value of x depends on value of y .
Calculation:
Consider ,
The equation is linear.
We have
Thus, the number of cars are
Chapter 2 Solutions
Algebra 2
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