A pair of linear equations is shown below:
2 answers:
Answer:
The correct option is D.
Step-by-step explanation:
The given equations are
The slope intercept form of a line is
Where, m is slope and b is y-intercept.
In equation (1),
Here, m=-1 and b=1. It means the slope of the line is -1 and y-intercept is 1.
In equation (1),
Here, m=2 and b=4. It means the slope of the line is 2 and y-intercept is 4.
The steps to solve the pair of equations graphically are:
Step 1: On a graph, plot the line y = -x + 1 which has y intercept = 1 and slope = -1; and y = 2x + 4 which has y intercept = 4 and slope = 2.
Step 2: Write the coordinates of the point of intersection of the two lines as the solution.
Therefore the correct option is D.
You might be interested in
Answer
Find out the what is the percent error in the measurement, to the nearest tenth of a percent .
To prove
Formula
Where error = | Approx - Exact |
As given
Karen measures the width of a garden plot and records that it is 44.25 meters. Its actual width is 45.5 meters.
Approx value = 44.25 meters
Actual value = 45.5 meters
error = | 44.25 - 45.5 |
= |-1.25|
= 1.25
Put in the formula
Percentage error = 2.7%
Therefore the percentage error is 2.7% .