Answer: y = 3x-8
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Explanation:
The slope is 3, so m = 3
The given point is (3,1) meaning x = 3 and y = 1. The x coordinate is always listed first in an ordered pair. The general format is (x,y)
We'll use m = 3, x = 3 and y = 1 to find the y intercept
y = mx+b
y = m*x+b
1 = 3*3+b ... plug in m = 3, x = 3 and y = 1
1 = 9+b
1-9 = 9+b-9 ... subtract 9 from both sides
-8 = b
b = -8
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So we're given m = 3 as the slope and we just found that b = -8 is the y intercept
So y = mx+b updates to y = 3x-8. This is the final answer.
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Side Notes:
* The slope of 3 means rise/run = 3/1 indicating each time we go up 3, we move to the right 1
* The y intercept -8 is the location on the vertical y axis numberline where the graph crosses. The point (0,-8) is on this line.
The area of a circle is pie r squared. so you are going to want to find the area of both circles and then because the middle of the disk is empty space, you will subtract the middle area from the bigger area.
first, find the radius. The radius is the diameter divided by 2. So it is 6cm for the big circle. Then in the area equation the radius is squared so you get 36cm and then to get the final area you multiply by pie. (i don't have a calculator with me sorry).
next, you want to find the area of the smaller circle. Do the same process and use the equation. You should get 0.5625 times pie.
Then the last step is taking 36cm times pie divided by 0.5625 cm times pie and you get your answer
Answer:
0.875
Step-by-step explanation:
Most of the geometry concepts and theorems that are learned in high school today were first discovered and proved by mathematicians such as Euclid thousands of years ago. Given that these geometry concepts and theorems have been known to be true for thousands of years,
The answer to question 2 is 17/20
3/5+1/4=?
They need common denominator which is 20
12/20+5/20=17/20