The line y = 2x - 3 will have no solution with the given parabora. All other lines gives a real solution except the line y = 2x - 3
If the speed of the stream is x
Time is given by d/r , where r is the rate and d is the distance;
Rate for upstream = (15-x) mph and that of down stream is (15 +x) mph
The time taken will be the same;
Thus; 2/(15-x) = 4/(15+x)
cross multiplying;
30 +2x = 60 -4x
6x = 30
x =5
Therefore the rate of the river is 5 mph
Answer:
Slope -1/2 y-intercept 1
Step-by-step explanation:
The line crosses through the y-axis at 1
By counting, the line goes down one and over two
The line has a downward slope resulting in a negative slope
Answer:
The graph shows that when x =3 both
and 5 – x equal 2
Step-by-step explanation:
The equation 13x + 1 = 5 – x can be solved by graphing y = 13x + 1 and y = 5 – x.
From the graph, the two lines representing the two equations intersect at (3,2).
This implies that the solution to the system
and
y=5-x
is x=3, y=2
Hence the value of the two functions equals 2 at x=3.
