Does anyone know how to answer this? The Probability that you draw a mechanical pencil from a group of 25 mechanical and wooden
1 answer:
Answer:
There are 15 mechanical pencils
Step-by-step explanation:
Recall that the probability of drawn a mechanical pencil from a larger group is given by the quotient of the number of mechanical pencils divided the total number of pencils in the sample.
so that means:
being x the number of mechanical pencils and 25 the total of all pencils in the sample. Since they give as P as 3/5, we can solve for the number of mechanical pencils (x) using the equation:
So there are 15 mechanical pencils in the sample.
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A rectangle has four sides, two equal to the width and two equal to the length. So, the perimeter is
If we know that the width is 5, and the perimeter is 125, we have
In your case, the unkown is called x, but the concept is the same:
where x is the length of the rectangle.
Answer:
Therefore the required point where it crosses y-axis is (0 , 4)
Step-by-step explanation:
Given:
...............Equation of line
Intercepts:
The line which intersect on x-axis and y-axis are called intercepts.
There are two intercepts:
x-intercept: The line which intersect at x-axis. So when the line intersect at x-axis Y coordinate is zero.
y-intercept: The line which intersect at y-axis. So when the line intersect at y-axis X coordinate is zero.
For a line crosses Y-axis we have,
Put x = 0 in above equation we get
Therefore the required point where it crosses y-axis is (0 , 4)