Solve the system of equations by finding the reduced row-echelon form of the augmented matrix for the system of equations

I’m still confused on how to work the percentages

Problem situation: caren is making rice and beans. she can spend no more than $10 on ingredients. she buys one bag of rice for $4.99. beans cost $0.74 per pound. how many pounds of beans, x, can she buy? inequality that represents this situation: 10≥4.99+0.74x drag each number to show if it is a solution to both the inequality and the problem situation, to the inequality only, or if it is not a solution.

Which graph of a hyperbola represents the equation 16x^2-y^2=16