Evaluate 5! 4! = i really need with this question!

Derricks dog sitting and darlene's dog sitting are competing for new business. the companies ran the ads shown.which dog sitting service is more economic to use if you need 5 hours of service? explain.

Two blends of tea are mixed to make a blend that will be sold at the fair. black tea sells for $2.20 per pound and orange pekoe tea sells for $3.00 per pound. how much of each should be used to obtain a 4lb blend selling for $2.50 per pound?

How many solutions does the nonlinear system of equations graphed below have?