HELP ASAP ASAP PLEASE PLEASE you can use a calculator

Use the elimination method to solve the system of equations -x+5y=-4 and 4x+3y=16

Afamily of five rents a kayak and splits the total time, k, equally. each family member spent less than 25 minutes kayaking. which values can be used to complete the math sentence below so that it accurately represents the situation? intro done

Find the magnitude, correct to two decimal places, made by each of the following with positive direction of the x axis a) y= x the answer is 45° but i don’t know how