A supervisor records the repair cost for 17 randomly selected VCRs. A sample mean of $68.83 and standard deviation of $12.17 are
1 answer:
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Answer:
(i) a = 2
b = -1
c = -1
(ii) x= 1
Step-by-step explanation:
<u>Step 1: Factorise</u>
<u>Step 2: Use the complete square method. </u>
<u>Step 3: Have it</u><u> </u><u>to </u>
<u>Line of symmetry: </u>
To find line of symmetry, we use -b/2a formula.
Based from :
a=2, b=-4
-b/2a = -(-4)/2(2) = 1