13. On Saturday, Lukas drove 4x - 5 miles. On Sunday, he drove 3x - 10 miles. What is the difference in miles driven?
a) x + 15
b) X-5
c) x + 5
d) x - 15

The magnitude, m, of an earthquake is defined to be m=log l/s, where i is the intensity of the earthquake (measured by the amplitude of the seismograph wave) and s is the intensity of a “standard” earthquake, which is barely detectable. what is the magnitude of an earthquake that is 1,000 times more intense than a standard earthquake? use a calculator. round your answer to the nearest tenth.

Ineed to know the answer to this algebra question.

If olu is twice as old as funmi if the sum of their ages is 60 how old is olu