Im confused, i know how to calculate the volume of the shapes but i have no idea what numbers im supposed to use.

Arectangular exercise mat has a perimeter of 36 feet the length of the mat is twich the width writeand solve an equation to determine the length in feet. of the mat then find the area in square feet of the mart

Will give brainliest sum of arithmetic series (sigma notation) find the numerical answer to the summation given below. (image shown below)

Which of the following is an equation of a line parallel to the equation y=4x+1?