Add 145, 156, 210. and 255 then divide by 4. The mean equals 184.
Answer:
i think its b, i just did this assignment and i got a 100% so this is correct
have a nice day :)
Step-by-step explanation:
Hi!
I'm not sure how to slove this, but I do know how to solve it ;D
<h3>We can't know the exact value of y, but we can isolate y on one side. First, multiply by z on both sides. </h3>

x + y = 3 * z
<h3>Now subtract x from both sides.</h3>
x - x + y = 3 * z - x
<u>y = 3 * z - x</u>
<h2>The answer is y = 3 * z - x</h2>
Hope this helps! :)
-Peredhel