Can I multiply a fraction by (7/3)/(7/3) without changing its value?

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.

Which sum or difference identity would you use to verify that cos (180° - ∅) = -cos ∅? a. sin (α -β) = sin α cos β – cos α sin β b. cos (α -β) = cos α cos β – sin α sin β c. cos (α -β) = cos α cos β + sin α sin β d. sin (α + β) = sin α cos β + cos α sin β

What is the perimeter of square abcd? units units 28 units 37 units