Determine if (1, 3) is a solution to the given system of linear equations. 5x+y=8 x+2y=5
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A proportion looks like this:
It means that the quantity a,b,c and d are in the same proportion: the ratio between a and b is the same ratio between c and d.
They are particularly useful in situation when you have an example given, and you want to extrapolate the relationship for another couple.
For example, you can think of the following problem: "Five apples cost 2 dollars. How much will 8 apples cost?"
You can build the proportion
And then solve it for x:
First, divide the shape into two figures ( a semicircle and a rectangle)
Then, find the are or the two shapes using the area formula for a semicircle (
) and the are formula for a rectangle (base x height)
Finally, add the two areas together and you have your answer
Then, find the are or the two shapes using the area formula for a semicircle (
Finally, add the two areas together and you have your answer