Answer:
t_a = 7 s
t_w = 5 s
Step-by-step explanation:
Given:
- The average speed in air v_a = 16 m/s
- The average speed in water v_w = 3 m/s
- The total distance D = 127 m
- The total time T = 12 s
Find:
How long did the stone fall in air and how long did it fall in the water?
Solution:
- Lets time taken by stone to drop through air as t_a = t_a.
- The time taken in water would be t_w = (12 - t_a)
- The total distance covered can be calculated as:
D = v_a*t_a+ v_w*(12 - t_a)
127 = 16*t_a + 3*(12 - t_a)
Simplify and solve for t:
91 = 16*t_a - 3t_a
13*t_a = 91
t_a = 7 s
t_w = 5 s
Answer: M = 4
Step-By Step Explanation:
Answer:
Slope is -1/3 and y-intercept is 23/3
Step-by-step explanation:
Parallel lines share the same exact slope. This means that the line parallel to the equation y= -1/3x + 5 will have the same slope as it. Its slope is -1/3.
To find the y-intercept of the parallel line, substitute the slope -1/3 and the point (8,5) into the point slope form
.

The y-intercept is 23/3.
Answer:
WX = 4/2 or 2/1
XY = 3/2
YZ = 4/1
WZ = 3/3 or 1
Step-by-step explanation:
Find the rise over run of each dot by counting how many boxes it goes up or down. Then how many boxes it moves to the side.
Y=40x+100 and the second question is y=1.69x