Solve the following systems using substitution:
x+y=4
x^2+y^2=9

How do i do this activity, is appreciated

The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.

Find the volume of the solid whose base is the region bounded by f(x), g(x) and the x-axis on the interval [0, 1], and whose cross-sections perpendicular to the y-axis are squares. your work must show the integral, but you may use your calculator to evaluate it. give 3 decimal places for your answe