Answer:
100π
Step-by-step explanation:
The equation of the circumference of a circle is C=2πr.
So to get an answer that not rounded you would keep the π and multiply 50 by 2= 100
7/18 - 5/18
First, we need to combine the denominators. Luckily for you, the denominators (18) are the same. If they weren't, it would be a whole other process to go through to get your answer. To combine our denominators, we connect them and subtract the numerators (7 and 5).

Second, subtract 7 - 5 to get 2. Your fraction should now be 2/18, but it can still be simplified down more. To do so, we need to find the greatest common factor (GCF) of the numerator (2) and the denominator (18). To figure this out, let's list the factors of both of them.
Factors of 2: 1, 2,
Factors of 18: 1, 2, 3, 6, 9, 18
Out of the factors listed, which are the common factors between the numerator and the denominator? 1 and 2 are the common factors, but since we are looking for the 'greatest' common factor, it would be 2 since it is the higher number. The GCF is 2.
Third, we can now divide both the numerator (2) and the denominator (18) by the GCF we just found which is 2.

Fourth, our last step is to combine the new numerator and denominator we recently found, which is 2 (the numerator) and 9 (the denominator). We will put them in fraction form and have our answer. Your simplified fraction should look like:

Answer in fraction form:

Answer in decimal form:
The comments are that they both are multidigits numbers
Answer:
66°
Step-by-step explanation:
The angle sum theorem tells you the sum of angles in a triangle is 180°.
__
79° +x +35° = 180°
x = 180° -114° . . . . . . . . subtract 114° from both sides
x = 66° . . . . . simplify
If he multiplied the first equation by 5, that would give us:
10x + 45y = 205
Now we need to get -45y to eliminate the y-terms, So we divide -45 / 5 and we get -9. So we multiply the 2nd equation by -9.
(I'm assuming the first equation is actually 2x + 9y = 41, and not 2x + 9 = 41)