The cost of mailing a package of 2 pounds is $7.
Linear equation
A linear equation is in the form:
y = mx + b
where y, x are variables, m is the rate of change and b is the y intercept.
Let y represent the total cost of mailing a package that weighs x pounds. It is given by:
y = 2x + 3
For a package of 2 pounds:
y = 2(2) + 3 = $7
The cost of mailing a package of 2 pounds is $7.
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