Answer:
b
Step-by-step explanation:
gjhghjghj
<h2>
Answer:</h2>

<h2>
Step-by-step explanation:</h2>
We will use the Gaussian elimination method to solve this problem. To do so, let's follow the following steps:
Step 1: Let's multiply first equation by −2. Next, add the result to the second equation. So:

Step 2: Let's multiply first equation by −1. Next, add the result to the third equation. Thus:

Step 3: Let's multiply second equation by −35, Next, add the result to the third equation. Therefore:

Step 4: solve for z, then for y, then for x:


By substituting
into the first equation, we get the
. So:

Answer:
6.7
Step-by-step explanation:
If diameter is7, the radius is 3.5m
so c=2πr
=2×3.14×3.5
=21.98m
Answer:
b=18, a=9√3
Step-by-step explanation:
30-60-90 rule