exam Maths Puzzle Numerical Ability

The price of gasoline is $1.30 per gallon plus federal tax of F cents and a state tax of S cents. How many gallons of gasoline can be purchased for $20?

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exam Other Question

ms. jones has been given a loan of $2500 for 1 year. if the interest charged is $275, what is the interest rate on the loan? solve the equation show all work
x^2 - 3x = 10
x^2 - 3x + 10 = 0
x(x-3 + 10) = 0
I have no idea how to finish this problem