The formula for percent of increase/decrease:
difference in original and new/original x 100
17926-12475/12475=
5451/12475=
.4369
x 100=
43.7% increase
Answer:
A is correct.
Step-by-step explanation:
Here, the x would represent the gallons per minute. The minutes are unknown, so it's just a variable. It can't be B either, because the addition sign would mean that the pool is being filled instead of drained.
<h2>○=> <u>Correct option</u> :</h2><h2>
![\color{plum}\tt\bold{(B)}](https://tex.z-dn.net/?f=%5Ccolor%7Bplum%7D%5Ctt%5Cbold%7B%28B%29%7D)
</h2><h3>○=> <u>Steps to derive correct option</u> :</h3>
We know that :
![\color{hotpink} \tt \: circumference \: of \: a \: circle\color{plum} = 2\pi r](https://tex.z-dn.net/?f=%5Ccolor%7Bhotpink%7D%20%5Ctt%20%5C%3A%20circumference%20%5C%3A%20of%20%5C%3A%20a%20%5C%3A%20circle%5Ccolor%7Bplum%7D%20%3D%202%5Cpi%20r)
So, let the diameter of this circle be x.
Which means :
![=\tt2 \times \pi \times r](https://tex.z-dn.net/?f=%20%3D%5Ctt2%20%20%5Ctimes%20%5Cpi%20%20%5Ctimes%20r)
![=\tt 2 \times x \times \pi = 12\pi](https://tex.z-dn.net/?f=%20%3D%5Ctt%202%20%5Ctimes%20x%20%5Ctimes%20%5Cpi%20%3D%2012%5Cpi)
![=\tt 2x\pi = 12\pi](https://tex.z-dn.net/?f=%20%3D%5Ctt%202x%5Cpi%20%3D%2012%5Cpi)
![=\tt x = \frac{12}{2}](https://tex.z-dn.net/?f=%20%3D%5Ctt%20x%20%3D%20%20%5Cfrac%7B12%7D%7B2%7D%20)
![= \tt \: x = 6 \: m](https://tex.z-dn.net/?f=%20%3D%20%5Ctt%20%5C%3A%20x%20%3D%206%20%5C%3A%20m)
Thus, the radius of the circle Robert drew = 6 m
Since the circle in option B has a radius of 6 m, it is the circle Robert drew.
▪︎<em>Therefore, the correct option is (B)</em>
Answer:
The eight represents a tenth/ten
Step-by-step explanation:
The 2 represents a two hundred, the 8 a eight tenth/eighty and the 1 a one
Answer:
(-15, 13)
Step-by-step explanation:
-3(8x + 9y = -3)
4( 6x + 7y = 1)
-24x - 27y = 9
24x + 28y = 4 (add both equations)
y = 13
6x + 7*13= 1
6x + 91= 1
6x = 1 -91
x = -91/6
x = -15