If the weight of a package is multiplied by 5/7 the result is 40.5 pounds. find the wight of the package

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angles. measure need asap

Alana has 12.5 cups of flour with which she is baking four loaves of raisin bread and one large pretzel. the pretzel requires 2.5 cups of flour to make. how much flour is in each loaf of raisin bread? explain the steps to follow to get the answer.

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