You can multiply the price of the journals with the answer choices and add that amount with how much his backpack cost and that'll give you your final cost.
<h2>
Answer: C. 4 notebooks</h2>
54.60/3.90=14
Mark’s gas tank will fill up with 14 gallons of gas.
First of all, the left triangle is an equilateral triangle. Which means that all the interior angles are 60 degrees.
4w=60
w=15
Then all 3 sides are equal thus we can set up equation 3x-y=4y then simplify,
3x=5y
Going to the triangle on the right its isosceles we can set up equation 2x+50=180
2x=130
x=75
Substitute this back into equation above 3x=5y
5y=3*75
y=45
Therefore
x=75
y=45
w=15
Done!
