Noah and audrey are simplifying the expression 5x-4+x+2, whos is wrong and why;
noah: 5x - 4 + x + 2 = 5x - 2
audrey: 5x - 4 + x + 2 = 6x - 2
also write an expression that contains three terms that is in simplest form. one of the terms should be a constant

Asphere has a diameter of 10 in. what is the volume of the sphere?

Match the scale and the actual area to the area of the corresponding scale drawing. scale: 1 inch to 4 feet actual area: 128 square feet scale: 1 inch to 7 feet actual area: 147 square feet scale: 1 inch to 8 feet actual area: 256 square feet scale: 1 inch to 5 feet actual area: 225 square feet area of scale drawing scale and actual area scale drawing area: 3 square inches arrowright scale drawing area: 8 square inches arrowright scale drawing area: 4 square inches arrowright scale drawing area: 9 square inches arrowright

Given that y varies directly to the square root of (x + 1), and that y = 1 when x = 8,(a)express y in terms of .x,(b)find the value of y when x = 3,(c)find the value of x when y = 5.