Answer:
Get some sleep...
Step-by-step explanation:
<h2>y2-y1/x2-x1 </h2><h3>this is the formula </h3>
Answer:
40
Step-by-step explanation:
Let number of stickers Sophia has be "x" and number of stickers Ethan has be "y"
Now,
Sophia has 3 for every 2 ethan has, that means
3x = 2y
When sophia gives 16, she will have:
3x - 16
Ethan, after getting 16, will have:
2y + 16
This trade will make Ethan to have TWICE, so we can write:
2(3x-16) = 2y + 16
Now, the 1st equation can be written as:
3x = 2y
x = 2y/3
Now replacing this into 2nd, we solve for y:

So, x is:

<u>Ethan and Sophia has:</u>
<u>24 + 16 = 40 stickers altogether</u>
Answer:
Step-by-step explanation:
n + 3n - 1 + 2n + 1 = 42
6n = 42
n = 7
s1 = 7 inch
s2 = 20 inch = 3(7) - 1
s3 = 15inch = 2(7) + 1