deanna and pietra each go for walks around a lake a few times per week . last week, deanna walked 7 miles more than pietra if p
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Answer:
Perimeter of rectangle ABCD = 47.62
Step-by-step explanation:
The perimeter of a rectangle is P = 2(length + width)
You need to find length and width
If you graph, you can pick your length length and your width
Pick two points after you graph, for
Use the distance formula to find the length =
point B (4,5) will be point 1 and point C (8,-3) will be point 2
Substitute
length =
length =
length = 8.94
Use the distance formula to find the width =
point C (8,-3) will be point 1 and point D (-2,8) will be point 2
Substitute
width =
width =
width =
width =
width = 14.87
Now use formula P = 2(length + width)
P = 2(8.94 + 14.87)
Perimeter of rectangle ABCD = 47.62
The linear combination method is the same as the elimination method. Let's multiply the second equation by -2 so the x terms cancel each other out. When we do that we get a system of 
and 
. The x-terms cancel each other out giving us 
and y = -3. Now sub -3 into one of the equations to solve for x. x+2(-3)=-4, and x - 6 = -4. x = 2. So the solution for our system is (2, -3)
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Answer:
£135.98
Step-by-step explanation:
It cost £135.98 for petrol in April.