Answer:
74 mph
Step-by-step explanation:
The driver started driving at s mph.
After 3 hours, the speed became s + 10 mph.
The total time is 11 hours, so 3 hours were driven at s mph and 8 hours were driven at s + 10 mph.
speed = distance/time
distance = speed * time
distance = (distance driven at speed s) + (distance driven at speed s + 10)
894 = s * 3 + (s + 10) * 8
3s + 8s + 80 = 894
11s + 80 = 894
11s = 814
s = 74
Answer: 74 mph
I don’t know part a but part b is -87 feet
<h3>
Answers: integer and rational number</h3>
Explanation:
The set of whole numbers is {0,1,2,3,4,...} which consists of positive values and 0. So we can cross "whole numbers" off the list since -5 is negative.
The set of integers is {..., -3, -2, -1, 0, 1, 2, 3, ...} which now considers the negative whole numbers. The value -5 is in this list. So -5 is an integer.
It's also a rational number because -5 = -5/1 showing it is a fraction or ratio of two integers.
<span>b – 2a – c
= 9 - 2(-3) - (-6)
= 9 + 6 + 6
= 21
answer
21</span>
