5x - 2y = 6 x = 5 - y solve the system of equations by substitution. a. (16/7, 19/7) b. (-4/3, 19/3) c. no solution d. coincident

[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are -1 and 4. but why not positive 1?

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?

What are the domain and range of the function f(x)=2^x+1