Subtract. Express your answer in lowest terms.

12 1/3 - 7 5/7
please answer in fraction form

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?

Which speed is the fastest (use 1 mile ≈ 1.6 kilometers)? a. 12 miles/hour b. 18 feet/second c. 19 kilometers/hour d. cannot be determined

Find the value. a. 0.003 b. 0.03 c. 0.3 d. 3