the length of a rectangle is 4 cm less than 5 times its width its perimeter is 160 cm find its length and width

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

Thales was an ancient philosopher familiar with similar triangles. one story about him says that he found the height of a pyramid by measuring its shadow and his own shadow at the same time. if the person is 5-ft tall, what is the height of the pyramid in the drawing?

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply