The statement suppose <span>that r varies directly with s and inversely with t is best represented as:
r </span>α s/t
To make it into equality, we insert a proportionality constant, k:
r = ks/t
Using the initial conditions, we solve for k.
r = ks/t
<span>r = 2 when s = 3 and t = 12
2 = k(3)/12
k = 8
Thus, when </span><span>s = 5 and t = 4,
</span>
r = 8(5)/4
r = 10 -----> OPTION C
Your answer should be 81 for a. I got this result by multiplying 9 by 9.
What is the result of isolating y^2 in the equation below (x-2)^2+y^2=64?
Solution:
We want to isolate 
from the equation 
To isolate , we must try to get alone
So, We must subtract 
from both sides
Distributing '-' inside parenthesis
Answer:
<h2>8:12</h2>
Step-by-step explanation:
Ok so the starting ratio is 4:6
It is 20 members last year and 25 member the next year.
LAST: 20 THIS YEAR:25
When u use the ratio of 4:6 IN 25 students, u get
8:12 LAST year.
You can check because 8 + 12 = 20, or the total number of students.
