Will choose brainliest! Using the clues provided, determine how many bills are in each envelope.

The 1st envelope has two more bills than half the number that are in the 2nd envelope.
If you double the number of notes in the 3rd envelope, it would have the same number as the 1st and 2nd together.
The 3rd envelope has more than the 1st, but fewer than the 2nd.

Lets set up some variables:

Now let us set up some equations based of the facts:

Now we could try some numbers out since there isn't really any other way I could solve this so far...

 but we do know that the sum of and must be even since they equal

After you tried it out for a little bit, when = 2, then = 8, and . These three values meet the criteria and we have our answer.

Hope that helped!

Cost of 7 gallons=$24.50

Cost of 1 gallon=24.50/7=3.5

Cost of 15 gallons=15*3.5=52.5

Cost of 15 gallons will be $52.5

The answer is in the image 

y=2x+15

where y=Value of coin

x=Age in years

Value of coin after 19 years=2*19+15

=$53

Therefore, Value after 19 years=$53

Salesperson will make 6% of 1800

=(6/100)*1800

=108

Salesperson will make $108 in $1800 sales

The wood before starting =12 feet

Left wood=6 feet

Wood used till now=12-6=6 feet

Picture frame built till now= 6/(3/4)

=8 pieces

Therefore, till now 8 pieces have been made.

The wood before starting =12 feet

Left wood=6 feet

Wood used till now=12-6=6 feet

Picture frame built till now= 6/(3/4)

=8 pieces

Therefore, till now 8 pieces have been made.

Salesperson will make 6% of 1800

=(6/100)*1800

=108

Salesperson will make $108 in $1800 sales

The answer is in the image