The length of a rectangle is 9 centimeters less than four times it’s width. it’s area is 28 square centimeters. find the dimensions of the rectangle

Aheated piece of metal cools according to the function c(x) = (.5)x ? 7, where x is measured in hours. a device is added that aids in cooling according to the function h(x) = ? x ? 2. what will be the temperature of the metal after two hours?

Si la base de un triángulo isósceles mide 70 m y el ángulo opuesto a ésta mide 58°; entonces ¿cuánto mide la altura de dicho triángulo? a) 21.87 m. b) 40.01 m. c) 43.74 m. d) 63.14 m.

There were 25 students who answered to a survey about sports. four-fifths of them like football. how many students like football?