Tom worked 74 hours in 2 weeks. if he earns 7.55 a hour, how much did he earn in the 2 week period?

Mathematics

2 answers:

sveticcg [70]2 years ago

3 0

558.7 , because 74 x 7.55 = 588.7 , it would be his total for the two weeks

devlian [24]2 years ago

3 0

$558.70 because 7.55 times 74 equals 558.7

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-3^(-x)-6=-3^x+10<br><br>Solve the equation below for x by graphing plz

vitfil [10]

To graph it, just graph $y=-3^{-x}-6$ and $y=-3^x+10$ and see where they intersect

I would like to solve it by using math and not graphing
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the graphical meathod is above, first line, just read it

hmm
multiply both sides by -1
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multiply both sides by $3^x$
$3^0+6(3^x)=3^{2x}-10(3^x)$
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we can rewrite it as
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now factor
I mean use quadratic formula
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$u=8+/-\sqrt{65}$
remember that u=3^x so u>0
if we have u=8+√65, it's fine, but u=8-√65 is negative and not allowed
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$8+\sqrt{65}=3^x$
if you take the log base 3 of both sides you get
$log_3(8+\sqrt{65})=x$
if you use ln then
$ln(8+\sqrt{65})=xln(3)$
then
$\frac{ln(8+\sqrt{65})}{ln(3)}=x$