A bag contains white marbles and blue marbles, 79 in total. the number of white marbles is 6 less than 4 times the number of blu
1 answer:
Let x be the number of white marbles and y be the number of blue marbles.
So,
Also,
since "<span>the number of white marbles is 6 less than 4 times the number of blue marbles</span>"
We will solve the above system o two equation:
Using the value of x from the second equation in the first equation we get:
Conclusion: there is 62 white marbles and 17 blue marbles.
So,
Also,
We will solve the above system o two equation:
Using the value of x from the second equation in the first equation we get:
Conclusion: there is 62 white marbles and 17 blue marbles.
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Therefore the equation of the line in function-form is f(x)=-2x-1
An equation of a line on the cartesian plane is given by y=mx+c. Here m denotes the slope of the line and c denotes the y-intercept.
Slope of a line is defined as the inclination of the line along the positive x- axis . Slope is calculated by the formula where
and
are two points on the line.
y-intercept is defined as the point where the line passes through the y-axis.
From the graph we can see that the line passes through (0,-1)and (-1,1)
therefore slope of the line is
Now we know that the equation of a line passing through a point and with slope m is given by
Substituting the values in the equation we get
y-(-1)=-2(x-0)
or, y=-1-2x
Therefore the equation of the line in function-form is f(x)=-2x-1 .Hence the second option is correct.
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