If the rule of the function is "multiply by 2 then add 3" and the input value is -2, what is the output value

Given: △abc, ab=15, bd=9 ad ⊥ bc , m∠c=30°. find: the perimeter of the triangle.

The number of potato chips in a bag is normally distributed with a mean of 71 and a standard deviation of 2. approximately what percent of bags contain between 69 and 73 potato chips? approximately 68% approximately 71% approximately 95% approximately 99.7%

Suppose i flip two identical coins. what is the probability that i get one head and one tail?