a school has 415 third grade and 338 second graders how many more third graders are there than second graders?

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

Which of the statements about the graph of the function y = 2x are true? check all of the boxes that apply. the domain is all real numbers x because the exponent of 2 can be any real number when the x-values increases by 1 unit, the y-value multiplies by 2. the y-intercept is (0, 1). the graph never goes below the x-axis because powers of 2 are never negative. the range is all real numbers.

X+y=-4 x-y=2 use elimination with adding and subtraction