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Tomtit [17]
3 years ago
12

Substitution method- y=-x+4 and y=3x

Mathematics
1 answer:
kumpel [21]3 years ago
5 0
Substitue y=3x into the other equation to get 3x=-x+4. Solve this to get 4x=4 therefore x=1.
knowing this, y=3
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15. The table below shows the various ways
Kipish [7]

Answer:

45 %  

Step-by-step explanation:

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3 years ago
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HELP ME PLZ answer question below
Ronch [10]

Answer:

11. -2

12. +0.5

Step-by-step explanation:

11. as x increases by 1, y decreases by 2, -2/1 = -2 the ROC is -2 (rate of change)

12. as x increases by 2, y increases by 1, 1/2 = 0.5, ROC is +0.5

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Plug 15 in for x i think
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Svet_ta [14]
7.

To swap a figure to 90 degrees counter clock wise turn the points from

(x,y) to (-y,x)

Let’s get your points

(-2,3) ; (-4,2) ; (-2,-4)

Swap the values and make the new x’s negotiate

(-3,-2) ; (-2,-4) ; (4,-2)

These should be the points of the new figure with is 90 degrees counterclockwise of the first one.

10.

To find x you can either:

Add 93 and 54
Or
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x = 93 + 54
x = 147

Or

180 - 93 - 54
33
180 - 33 = 147

x = 147

8.

First we dilate the coordinates by 0.5

(-4,6) ; (2,6) ; (2,-4) ; (-4,-4)

Basically divide each x and by by two

(-2,3) ; (1,3) ; (1,-2) ; (-2,-2)

Two units left would be to subtract two from the x values

(-4,3) ; (-1,3) ; (-1,-2) ; (-4, -2)

Add three to each y value

New coordinates:

(-4,6) (-1,6) (-1,1) (-4,1)

6.

Since these are the same circle, then we need to multiply the radius by 2 and then make the newly formed diameters equal to each other

2(6x) = 10x + 8

Multiply

12x = 10x + 8

Get x on one side

2x = 8

Divide

x = 4

Plug in 4 for an equation

2(6(4))

48

Circumference = pi * diameter

Unsure if you use 3.14 for pi

If you use 3.14 :

(3.14) (48) = 150.72

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8 0
2 years ago
Donna is going to swim 20 laps. She has completed 6 laps. What fraction of laps has she completed? What fraction of her swim rem
Citrus2011 [14]

Answer:

1.6/20

2.14/20

Step-by-step explanation:

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