Kristen completed 42 km. We will imagine that she ran all 6 hours. => 9 * 6 =54 km which is more than she actually completed. So we will find a 9 Multiple less than 42 km and that will be 36 km. (9 * 4 = 36 km completed by running) and the rest until 42 were completed by walking (3 * 2 = 6; 6 + 36 =42).
200,000+ 70,000+ 7,000+ 100+ 80
Three times ten plus seven times one plus three times one-tenth plus five times one-hundredth
ANSWER:
Change in the Independent Variable / Change in the Dependent Variable
hope this helps!!
4(5x + 12) simplified = 20x + 48