Evan has x red marbles, twice as many blue marbles as red marbles and y yellow marbles,
How many marbles does Evan have altogether in terms of x and y?

Is every rectangle is a parallelogram? true false

7x+8y=-18, 4x-9y=-3 solve the system of equations

Tim open up a new saving account with a $50 deposit and plant to deposit $20 per week into the same account.write an expression to represent the total amount in his savings account.