Which sum or difference identity could be used to prove that cos(270º - thata) = -sin thata is an identity?
cos 270° cos 8 – sin 270° sin e
cos 270° cos 0 + sin 270° sin e
O sin 270° cos
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cos 270° sin e
O sin 270° cos 0 + cos 270° sin 0

Astandard american eskimo dog has a mean weight of 30 pounds with a standard deviation of 2 pounds. assuming the weights of standard eskimo dogs are normally distributed, what range of weights would 99.7% of the dogs have? approximately 26–34 pounds approximately 24–36 pounds approximately 28–32 pounds approximately 29–31 pounds

Louise measured the perimeter of her rectangular scrapbook to be 154 cm. if the scrapbook is 45 cm wide, how long is the scrapbook?

What value of x is in the solution set of 4x - 12 s 16 + 8x? -10 -9 -8 -7