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3 years ago

What is the difference in the rule of reflection for a point reflected across y=x and a point reflected across y=-x

Mathematics

1 answer:

rjkz [21]3 years ago

5 0

Answer:

The difference in the rule of reflection for the point reflected across y = x is, the rule would be (x, y) ---> (y, x). So the x and y values would be switched around. On the other hand, the rule of reflection for the point reflected across y = -x is, the rule would be, (x, y) ---> (-y, -x). So the values would switch places and would have the opposite sign (If the number was positive, it would be a negative, and if it was a negative number, it would turn into a positive.)

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Priya drew a circle whose area is 25 cm. Dan drew a circle whose diameter is 4 times the radius of Priya's circle. How many time

Vitek1552 [10]

Answer:

400

Step-by-step explanation:

first work out the radius of priya's circle with the equation a = $\pi r^{2}$

$25 = \pi r^{2}$

$\frac{25}{\pi } = r^{2}$

$r = \sqrt{\frac{25}{\pi } }$

we know the diameter of a circle is 2 times the radius so the diameter of priya's circle is 2x $\sqrt{\frac{25}{\pi } }$

this means that if the diameter of dan's circle is 4 times bigger it must be

8x $\sqrt{\frac{25}{\pi } }$

to find the radius of dan's circle we divide the diameter by to 2 to give

4x $\sqrt{\frac{25}{\pi } }$

then use the a= $\pi r^{2}$ equation again

$a= (4 \sqrt{\frac{25}{\pi } })^{2} \pi$

which equals 400

hope that helped

6 0

3 years ago

Suppose you just purchased a digital music player and have put 15 tracks on it. After listening to them you decide that you like

Lilit [14]

The given case is an example of permutation problem because the order is important given that you should like the first two songs. The sample space is calculated through the equation,
15P2 = 210
Then, there are 3 songs that you liked, the probability of picking 2 out of them is,
3P2 = 6
Dividing the latter by the earlier result will give us an answer of 1/35.

8 0

3 years ago

What is 1/8 divided by 2

erma4kov [3.2K]

Answer:

Divide: 2 : 1

= 2

· 8

= 2 · 8

1 · 1

= 16

Dividing two fractions is the same as multiplying the first fraction by the reciprocal value of the second fraction. The first sub-step is to find the reciprocal (reverse the numerator and denominator, reciprocal of 1

is 8

) of the second fraction. Next, multiply the two numerators. Then, multiply the two denominators.

In words - two divided by one eighth = sixteen.

SO FINAL ANSWER IS 16!!! HOPE THIS HELPS YOU mark me the brainliest if im correct

6 0

3 years ago

Read 2 more answers

Hansen won the raffle At the zoo and gets to feed the dolphins! The dolphin trainer gives Hansen a bucket of fish to divide even

Pachacha [2.7K]

Answer:

Number of dolphins in zoo * number of fish per dolphin.

Step-by-step explanation:

Hansen won the raffle At the zoo and gets to feed the dolphins! The dolphin trainer gives Hansen a bucket of fish to divide evenly among five dolphins. Each dolphin gets four fish. Which equation can you use to find the number of fish F in the bucket before hansen feeds them

Given that:

Number of dolphins = 5

Fish in bucket is distributed equally ; hence, Number of fish per dolphin = 4

To obtain the initial number of fish in bucket before hansen began to feed the fishes :

Number of fish in bucket before hansen feeds then :

Number of dolphins in zoo * number of fish per dolphin.

5 * 4 = 20

6 0

3 years ago

Please answer correctly !!!!!! Will mark brainliest answer !!!!!!!!!

Phoenix [80]

Answer:

see below

Step-by-step explanation:

(x + 1.5)² - 2.25 - 28 = 0

(x + 1.5)² - 30.25 = 0

(x + 1.5)² = 30.25

5 0

3 years ago