Step-by-step explanation:
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Answer:
See below.
You know a and c.
c=√a²+√b² = 18.79=√17²+√b²
18.79=17+√b²
-17 -17
1.79=√b²
1.79=b
-hope it helps
9x-7y=31
9x-7y-<u>31</u>=31-<u>31</u>
9x-7y-31=0
9x-7y-31+=0
B.) 0.00692
6.92 x 10^-3
0.00692