Solve the equation square root of the quantity x plus 3 plus 4 equals 5 for the variable. Show each step of your solution process

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

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.