The temperature today was 81F and at night it went down 11F. Which statement is written correctly to find the temperature at night? Here are the options:
-81 + 11
81 + 11
-81 + (-11)
81 + (-11)

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.

Afactory adds 3 red drops and 2 blue drops of coloring to white paint to make each pint of purple paint. the factory will make 50 gallons of the purple paint.how many drops of red and blue coloring will the factory need in the 50 gallon batch of purple paint.

(! ) three cylinders have a height of 8 cm. cylinder 1 has a radius of 1 cm. cylinder 2 has a radius of 2 cm. cylinder 3 has a radius of 3 cm. find the volume of each cylinder