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For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

Aclass consists of 55% boys and 45% girls. it is observed that 25% of the class are boys and scored an a on the test, and 35% of the class are girls and scored an a on the test. if a student is chosen at random and is found to be a girl, the probability that the student scored an ais

Arectangle has a width of 5 cm and a length of 10 cm. if the width is increased by 3, how does the perimeter change?