If two lines intersect on a plane what is their interersection

Anabel uses 10 gallons of gas to drive 220 miles on the highway. if she travels at the same rate, how many miles can she drive on 7 gallons of gas

How can we find the measure of an exterior angle if we know the measurement of an interior angle

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.