A food scale can measure up to 9 kilograms of weight. What weights can the scale measure?

What percent of the circle below is shaded?

Solve the following system of equations express your answer as an ordered pair in the format (a, b) with no spaces between the numbers of symbols 5x+2y=22

Lena draws a square with an area that is greater than the area of rectangle b. what are two possible side lengths of lena's square? explain.