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Strike441 [17]
3 years ago
13

Graph y=-2(x+1)^2+4 (must show all work that leads to your graph) please help

Mathematics
1 answer:
bogdanovich [222]3 years ago
3 0

Answer:

See explanation

Step-by-step explanation:

This is a parabola that opens down with the vertex at (-1, 4)  So, find (-1, 4) on your graph.  Now, find y for x = 0 and x = 1 which will give you two points on the parabola.  Since the parabola is symmetrical, find the points that are the partners to the two points you just found.  That should give you a good idea as the graph.

when x = 0,

y = -2(0 + 1)^2 + 4 = -2(1) + 4 = 2    so (0, 2) is on the graph

when x = 1,

y = -2(1 + 1)^2 + 4 = -2(2)^2 + 4 = - 8 + 4 = -4     so (1, -4) is on the graph

Symmetry gives the point (-2, 2) as the partner to (0, 2) and

(-3, -4) as the partner to (1, -4)

I don't have graph  paper to show you that, you are going to have to graph those 5 points ((-1, 4), (0, 2), (1, -4), (-2, 2), (-3, -4)) and draw the parbola.

I hope this helps.  OK?

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If x-y =8 find the value of y when x=3
DedPeter [7]
Answer: y = -5

Substitute in 3 for x.
x - y = 8                            Substitution
3 - y = 8                            Subtract 3 from both sides
-y = 5                                Divide by -1 to both sides
y = -5                                Answer!

You can also check your work.
x - y = 8       
3 - (-5) = 8                  
3 + 5 = 8                        
8 = 8                                

8 0
3 years ago
A survey given to consumers leaving a supermarket three days before Thanksgiving asked whether turkey would be part of the Thank
timofeeve [1]

Answer:

(0.1392,0.1466)

Step-by-step explanation:

Given that a survey given to consumers leaving a supermarket three days before Thanksgiving asked whether turkey would be part of the Thanksgiving meal

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Margin of error = 1.96*SE=0.00378

Confidence interval = (0.1429-0.0037,0.1429+0.0037)\\=(0.1392,0.1466)

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3 years ago
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MakcuM [25]

Answer:

10

Step-by-step explanation:

The area of the rectangle is 100cm, so if the area of the square is the same as the rectangle, then the side of the square would be 10. 10 x 10 is 100.

(I'm sorry if my explanation sucks)

8 0
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22% of 50 is 11.
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Answer:

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x is an integer that is greater than 3 and less than or equal to 6.

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3 years ago
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