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dusya [7]
3 years ago
9

1. Is a rotation of 180° the same as a reflection over the y-axis? Please justify your answer in complete sentences.

Mathematics
1 answer:
sp2606 [1]3 years ago
5 0

Answer:

Not the same.

Step-by-step explanation:

Given that there is a rotation of 180 degrees .  To check whether this is a reflection over the y axis.

Reflection over the y axis make the coordinates (x,y) as (-x,y)

i.e. this means rotation of 180 degrees about the origin anticlockwise.

Hence just rotation of 180 degrees is not the same as a reflection over y axis.

The conditions are:

i) 180 degree to be rotated anticlockwise

ii) Rotation is about the origin

Hence a rotation of 180 degrees need not always be the same as reflection over y axis.

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If y varies directly as x and y is 12 when x is 6, what is the value of y when x is 11
Nataly_w [17]

Answer:

22

Step-by-step explanation:

Multiply 11 by 12, then divide by 6

6 0
3 years ago
Which polynomial identity will prove that 49-4=45
goldfiish [28.3K]
Consider the polynomial identity (difference of squares):
(x+y)(x-y) = x² - y²

Set x =7 and y = 2 to obtain
(7+2)*(7-2) = 7² - 2²
9*5 = 49 - 4
45 = 49 - 4
This is the result required, obtained by using difference of squares.

Answer: Difference of squares.
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3 years ago
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FinnZ [79.3K]

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simply because it asks what the heaviest is

8 0
3 years ago
MATH<br> MATh<br> MAtH<br> MAAAAThHhH<br> YAAA
MariettaO [177]

Answer:

6k + 19

Step-by-step explanation:

7k - k + 19

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7 0
2 years ago
Read 2 more answers
Of the coffee makers sold in an appliance​ store, 4.0% have either a faulty switch or a defective​ cord, 2.5% have a faulty​ swi
lukranit [14]

Answer: Hence, Probability that a coffee maker will have a defective cord is 0.376=37.6%.

Step-by-step explanation:

Since we have given that

Let A be the event of getting a faulty switch.

Let B be the event of getting a defective cord.

Here, P(A∪B) = 4% = 0.04

P(A∩B) = 0.1% = 0.001

P(A) = 2.5% = 0.025

We need to find P(B):

As we know that

P(A\cup B)=P(A)+P(B)-P(A\cap B)\\\\0.04=P(A)+0.025-0.001\\\\0.04=P(A)+0.024\\\\P(A)=0.04-0.024=0.376

Hence, Probability that a coffee maker will have a defective cord is 0.376=37.6%.

6 0
3 years ago
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