Answer:
A=bh..I don't get for those numbers
The value for n is 
<h3>solving for n</h3>
<u>given data</u>
10n^{2} - 12 = -8
making n the subject of the formula
10n^{2} = -8 + 12
10n^{2} = 4
divide through by 10
n^{2} = 4 / 10
finding the square root of both sides
n = square root ( 4 / 10 )

n = 0.632 or 
Read more the subject of formula here: brainly.com/question/21140562
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Answer:
Step-by-step explanation:
it is 17/50 or 34%
An addition sign between 978 and 842 would make the equation true!
Cole would pay $25.30
Because 23/10=2.3
2.3+23=25.3
Hope this helped