Please help, I’m confused! This is a Two-Step Linear Equations. I really would appreciate if someone could help me out!

• Create an equation to the problem
• Solve the equation
• Verify the equation

During a bike challenge riders have to collect various colored ribbons each 1/2 mile they collect a red ribbon each eighth mile they collect a green ribbon and each quarter mile they collect a blue ribbion wich colors of ribion will be collected at the 3/4 markrer

What is the expression in factored form? -x^2 + 3x + 28 a. (x-7)(x-4) b. -(x-7)(x+4) c. (x+4)(x+7) d. -(x-4)(x+7)

Which of the following contains a variable?