2.5*60 = 150 if bust travel at 60 mile per hrs his friend live 150 miles far
2.5* 63=157.5 . if bus travel 63 miles per hours friend live 157.5 miles away
X=24 should be the correct answer
That is the pH scale
pH = - log of the concentration of hydrogen ions in a solution.
Missing part of question
(a) (-3, 4) and (5, 4)
(b) (4, 5) and (4, -3).
Answer:
(a) (-3, 4) and (5, 4)
Zero slope
Horizontal line
(b) (4, 5) and (4, -3).
Undefined slope
Vertical line
Step-by-step explanation:
Solving (a): (-3, 4) and (5, 4)
Slope (m) is calculated as:
![m = \frac{y_2 - y_1}{x_2 - x_1}](https://tex.z-dn.net/?f=m%20%3D%20%5Cfrac%7By_2%20-%20y_1%7D%7Bx_2%20-%20x_1%7D)
This gives
![m = \frac{4-4}{5 - -3}](https://tex.z-dn.net/?f=m%20%3D%20%5Cfrac%7B4-4%7D%7B5%20-%20-3%7D)
![m = \frac{0}{8}](https://tex.z-dn.net/?f=m%20%3D%20%5Cfrac%7B0%7D%7B8%7D)
![m = 0](https://tex.z-dn.net/?f=m%20%3D%200)
This line has a slope of zero.
When slope equals 0, then the line is horizontal
Solving (b): (4, 5) and (4, -3)
Slope (m) is calculated as:
![m = \frac{y_2 - y_1}{x_2 - x_1}](https://tex.z-dn.net/?f=m%20%3D%20%5Cfrac%7By_2%20-%20y_1%7D%7Bx_2%20-%20x_1%7D)
This gives
![m = \frac{5--3}{4-4}](https://tex.z-dn.net/?f=m%20%3D%20%5Cfrac%7B5--3%7D%7B4-4%7D)
![m = \frac{8}{0}](https://tex.z-dn.net/?f=m%20%3D%20%5Cfrac%7B8%7D%7B0%7D)
<em>m = undefined</em>
This line has an undefined slope.
When the slope of a line is undefined, then the line is vertical
Answer:
1. D. ray PS
2. C. angle GFE
3. A. 30 deg
Step-by-step explanation:
1. To name a ray, use two points on the ray. The first point must be the endpoint. The second point can be any point on the ray.
ray PS and ray PT are both correct.
Choose D. ray PS
2. Two ways of naming an angle are: 1. Use just the vertex point. 2. Use three points: a point on one ray, the vertex, a point on the other ray in that order.
This angle can be named:
angle EFG
angle GFE
angle F
Choose C. angle GFE
3. Angles CBE and ABD are vertical angles. Vertical angles are congruent. They have the same measure. Since angle ABD measures 30 deg, then angle CBE also measures 30 deg.
Choose: A. 30 deg