MATHEMATICS MIDDLE SCHOOL

2x-8y=-24
6x+4y=68
Using elimination method

Answers

Answer 1
Answer: 6(2x-8y=-24)
-2 (6x+4y=68)
12x-48y=-144
-12x-8y=-136
-56y=-280

-280÷-56=5
y=5

2x-8 (5)=-24
2x-40=-24
+40. +40
2x=16
16÷2=8
×=8


y=5
x=8
hope this helps, if needed a picture for better understanding,please comment.

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What are the slopes of line A and line B? Look at the picture

Answers

we can mark points on the graph shown , check the image I have shared with this for the points .

Formula for slope = (Y2-Y1)/(X2-X1)

So for Line A points are (1,3) and (0,-1)

So using t he formula slope is = (-1-3)/(0-1)

                  slope of line A =4


For Line B the points are  (0,4) and (3,-5)

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This week, Jolene withdrew $225 from her savings account. She made a deposit of $125 then bought $75.35 worth of groceries using her debit card. She now has $475.35. How much money did she have in her account at the beginning of the week?

Answers

Answer:

675.7 dollars

Step-by-step explanation:

1) 475.35 + 75.35 + 125 = 675.7

The sum of the areas of two circles is 8pie square meters. Find the length of a radius of each circle ifone of them is twice as long as the other.what is the radius of the larger circle?

Answers

nice

area=pir^2
the areas are
pir^2+pi(2r)^2
they add to 8pi

8pi=pir^2+pi(2r)^2
undistribute pi
8pi=pi(r^2+(2r)^2)
divide both sides by pi
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expand
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add
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divide by 5
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sqrt both sides
√(8/5)=r
double since it is double
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radius=(4√10)/5

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Answers

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Hope this helps!! :D

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Answers

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Answers

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