A manufacturer buys materials at $10 for 4 and sells them at $20 for 5. How many must it sell in order to make a profit of $600?

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

Write an expression that has three terms and simplifies to 4x - 7. identify the coefficient(s) and constant(s) in your expression

Find the value of x. give reasons to justify your solutions! c ∈ ae