He paid 3.19 per gallon both times......first time he bought 12.53 gallons....next time he bought 11.86 gallons
so ur expression is : 3.19(12.53 + 11.86)
Answer:

Step-by-step explanation:
<u>Equation Solving</u>
We are given the equation:

It's required to solve it for a.
Swap sides to have the letter on the left side:

Divide by
:

Answer: 2x+4=10
Step-by-step explanation:
because each notebook would cost $3 so 2 x 3 = 6 +4=10
Slope = 18/6 = 3
Y-intercept = -6
Equation: y = 3x -6
Considering the given angle and the given formula, it is found that the percentage error for an angle of 0.02 radians is of 0.0067%.
<h3>What is the percentage angle for an angle?</h3>
For an angle
, it is given by the following formula:

In this problem, the angle is of
, hence:


The percentage error for an angle of 0.02 radians is of 0.0067%.
More can be learned about percent error at brainly.com/question/25224978