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Liula [17]
3 years ago
15

Use the graphs of the transformed toolkit functions to write a formula for each of the resulting functions.

Mathematics
1 answer:
dimaraw [331]3 years ago
6 0

Answer:

y=-(x+1)^2+2.

Step-by-step explanation:

This is a parabola so it's parent is y=x^2.

Let's described what happened to get from the parent to this.

The graph has been reflected so we will have y=-x^2.

The graph has been moved left 1 and up 2 so this gives us:

y=-(x-(-1))^2+2.

Simplifying this gives us y=-(x+1)^2+2.

Let's see if a few points we can identify can help confirm or convince you.

Some points I see that cross nicely are:

(-3,-2)

(-2,1)

(-1,2)

(0,1)

(1,-2)

Let's check them and see.

y=-(x+1)^2+2 with (x,y)=(-3,-2):

-2=-(-3+1)^2+2

-2=-(-2)^2+2

-2=-4+2

-2=-2 is true so (-3,-2) does satisfy y=-(x+1)^2+2.

y=-(x+1)^2+2 with (x,y)=(-2,1):

1=-(-2+1)^2+2

1=-(-1)^2+2

1=-1+2

1=1 is true so (-2,1) does satisfy y=-(x+1)^2+2.

y=-(x+1)^2+2 with (x,y)=(-1,2):

2=-(-1+1)^2+2

2=-(0)^2+2

2=0+2

2=2 is true so (-1,2) does satisfy y=-(x+1)^2+2.

y=-(x+1)^2+2 with (x,y)=(0,1):

1=-(0+1)^2+2

1=-(1)^2+2

1=-1+2

1=-1 is true so (0,1) does satisfy y=-(x+1)^2+2.

y=-(x+1)^2+2 with (x,y)=(1,-2):

-2=-(1+1)^2+2

-2=-(2)^2+2

-2=-4+2

-2=-2 is true so (1,-2) does satisfy y=-(x+1)^2+2.

All the mentioned points satisfied our equation:

y=-(x+1)^2+2

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ivann1987 [24]

9514 1404 393

Answer:

  • large: 55 lb
  • small: 30 lb

Step-by-step explanation:

Let x and y represent the weights of the large and small boxes, respectively. The problem statement gives rise to the system of equations ...

  x + y = 85 . . . . . combined weight of a large and small box

  70x +50y = 5350 . . . . combined weight of 70 large and 50 small boxes

We can subtract 50 times the first equation from the second to find the weight of a large box.

  (70x +50y) -50(x +y) = (5350) -50(85)

  20x = 1100 . . . . simplify

  x = 55 . . . . . . . divide by 20

Using this in the first equation, we can find the weight of a small box.

  55 +y = 85

  y = 30 . . . . . . . subtract 55

A large box weighs 55 pounds; a small box weighs 30 pounds.

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