Answer:
what u have written is it a code language ?
Solve for x in first equation:
x-2y=7
Add “2y” to both sides
x=2y+7
Put this in to second equation:
3(2y+7)+2y=21
Solve for y:
Distribute the 3 into the ()
6y+21+2y=21
Combine the like y terms
8y+21=21
Subtract 21 from both sides
8y=0
Divide by 8 on both sides
y=0
Put this into the first solved equation:
x=2(0)+7
Solve for x:
Multiple 2(0)
x=0+7
Add 0 and 7
x=7
So the value of x is positive 7.
My answer to the problem is as follows:
<span>A lower standard deviation would mean that more of those scores are closer to the mean. The 3rd class mean is higher also, so you could conclude that the 3rd block class had more consistent higher scores than the first.
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I hope my answer has come to your help. God bless and have a nice day ahead!
2(books)*$3.50=$7.00
4(books)*$5.25=$21.00
Total bill=$34.00
$34.00-($7.00+$21.00)=$6.00
The 3 books was sold for $6.00 but its original selling price is $6.00*2 which is $12.00 reason being the books was sold for half the original price.
<span>It would take 36000 liters of water to fill a swimming pool that is 3m wide by 6m long,and 2 m deep.</span>
