Keiko is mixing 4 cups of concrete to make a stepping stone. She needs 1.5 cups of sand and 2.5 cups of cement mix. Which statem
ent best describes how much of each ingredient Keiko needs to measure? A. Keiko should make it easy and just measure about 1 cup of sand and 3 cups of cement mix since she needs a total of 4 cups. B. Keiko should measure exactly 1.5 cups of sand and 2.5 cups of cement mix to be sure the concrete will set properly. C. Keiko should make it easy and just measure about 2 cups of each since she needs a total of 4 cups.
We define the variables: p: cost of bushel of peaches w: cost of watermelon We wrote the system of equations: 12p + 5w = 150 15p + 8w = 198 We can represent the system in matrix form as Ax = b Where, A = [12 5; 15 8] b = [150; 198] x = [p; w]
