On a coordinate plane, trapezoid j k l m is shown. point j is at (negative 7, 4), point k is at (negative 4, 4), point l is at (negative 2, 3), and point m is at (negative 8, 3). what is the perimeter of trapezoid jklm? startroot 2 endroot + startroot 5 endroot units 2 + startroot 2 endroot + startroot 5 endroot units 9 + 2 startroot 2 endroot units 9 + startroot 2 endroot + startroot 5 endroot units

the perimeter =

Step-by-step explanation:

see the attached figure.

the perimeter of trapezoid JKLM = JK + KL + LM + MJ

The distance between two points (x₁ , y₁) and (x₂ , y₂)

=

Given the points L=(-7,4) , K=(-4,4) , L=(-2,3)  and M=(-8,3)

JK =

KL =

LM =

MJ =

So, JK + KL + LM + MJ =

So, the perimeter =

step-by-step explanation:

12: 00 p.m. to 7: 00 p.m. is a total of 7 hours.

4: 00 p.m. to 7: 00 p.m. is a total of 3 hours.

this means that from 4: 00 p.m to 7: 00 p.m. this represents 3/7 of what was lost from 12: 00 p.m. to 7: 00 p.m.

after knowing this, after doing 11,600 - 6,800 = 4,800

4,800 represents 3/7 of what was lost for 7 hours.

we then divide 4,800 by 3 which gets 1,600.

because we know that 1,600 represents 1/7 of how much water was lost, we just have to multiply by 7, which gets 11,200.   after adding 11,200 to how much water was left at 7: 00 p.m. which was 6,800. 11,200 + 6,800 = 18,000

this means that the pool originally had 18,000 gallons in the pool.

you can also check your work by doing 18,000 - 4(1600), which becomes           1800 - 6400 which gets you 11,600.