Systems of Equations Level 1:
Question 2
Which of these systems of equations has an infinite number of solutions?
Select one:

–5c + 8d = 20
–5c + 8d = 22

–6c + 11d = 20
–5c + 8d = 22

–6c + 11d = 20
–6c + 11d = 20

–6c + 11d = 22
–5c + 8d = 22

The function ƒ is defined by ƒ(x) = (x + 3)(x + 1). the graph of ƒ in the xy-plane is a parabola. which interval contains the x-coordinate of the vertex of the graph of ƒ?

Fabian harvests 10 pounds of tomatoes from his garden. he needs 225 pounds to make a batch of soup. if he sets aside 2.8 pounds of tomatoes to make spaghetti sauce, how many batches of soup can fabian make?

Assume that the weights of quarters are normally distributed with a mean of 5.67 g and a standard deviation 0.070 g. a vending machine will only accept coins weighing between 5.48 g and 5.82 g. what percentage of legal quarters will be rejected? round your answer to two decimal places.