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1 answer:
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The age of Sari is 8 years.
The age of Justin is 9 years.
Explanation:
Let x denote the age of Justin.
Let y denote the age of Sari.
Given that the product of their age is 72.
Thus, it can be written in equation as
Since, the numbers x and y are consecutive integers and Justin is older, then, it can be written as,
Therefore, the two equations are and
<u>The ages of Sari and Justin:</u>
The ages of Sari and Justin can be determined by solving the two equations.
Let us solve the equations using substitution method.
Substituting in the equation
, we have;
Factoring the equation, we get;
The value of y cannot be negative.
Thus, is the value of y.
Substituting in the equation
, we have;
Thus, the value of x is 9.
Therefore, the age of Sari is 8 years and the age of Justin is 9 years.
the slope is -2 and the y-intercept is 12
Step-by-step explanation:
1. choose two ordered pairs from the table (x1,y1) and (x2,y2).
2. write down the slope formula
3. replace the xs and ys by their values
4. subtract
5. divide
1. to solve for the y intercept, choose any one of the ordered pairs
2. replace the letters by their values
3. multiply
