0/85 large show jump 21 plungers into Abraham Lincoln’s grave but
on him
Answer:
45 miles per hour
Step-by-step explanation:
Time taken is given by distance/speed
Let speed on paved road be x hence on dirt road x-25
Time on paved road is ![\frac {135}{x}](https://tex.z-dn.net/?f=%5Cfrac%20%7B135%7D%7Bx%7D)
Time on dirt road is ![\frac {40}{x-25}](https://tex.z-dn.net/?f=%5Cfrac%20%7B40%7D%7Bx-25%7D)
The sum of these two time is equal to five hours hence expressed as
![\frac {40}{x-25}+\frac {135}{x}=5\\5(x^{2}-25x)=40x+135x-3375\\5x^{2}-125x=175x-3375\\5x^{2}-300x+3375=0\\x^{2}-60x+675=0\\(x-15)(x-45)=0\\x=15 or 45](https://tex.z-dn.net/?f=%5Cfrac%20%7B40%7D%7Bx-25%7D%2B%5Cfrac%20%7B135%7D%7Bx%7D%3D5%5C%5C5%28x%5E%7B2%7D-25x%29%3D40x%2B135x-3375%5C%5C5x%5E%7B2%7D-125x%3D175x-3375%5C%5C5x%5E%7B2%7D-300x%2B3375%3D0%5C%5Cx%5E%7B2%7D-60x%2B675%3D0%5C%5C%28x-15%29%28x-45%29%3D0%5C%5Cx%3D15%20or%2045)
Since speed was at a point reduced by 25, x can't be 15 hence x is 45.
Answer:
Hope this helps
Step-by-step explanation:
Answer:
See below
Step-by-step explanation:
P stands for probability that ( what ever is in the parentheses)
Total Number of Items In Box 1: 3+5= 8
P(picking a plain pencil given you are in box 1)= 3/8
Total Number of Items in Box 2: 9+3= 12
P(picking a color pencil given you are in box 2)= 9/12= 3/4