Find x if triangle ABC is a right triangle with angle B=90

The table shows the webster family’s monthly expenses for the first three months of the year. they are $2,687.44, $2,613.09, and $2,808.64. what is the average monthly expenditure for all expenses?

What is the solution set of the quadratic inequality x^2-5< or equal to 0

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.