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Reil [10]
3 years ago
11

What is the image of (8,7) after a reflection over the line y=-x?

Mathematics
1 answer:
4vir4ik [10]3 years ago
8 0

Answer:

(-7,-8)

Step-by-step explanation:

The original point is (8,7)

To reflect it, just switch their places and change their signs.

So, (-7,-8)

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A population of mold decays at a rate of 30 mold spores per day if the initial population of mold spores is 1560 spores how many
KonstantinChe [14]

Answer:

19

Step-by-step explanation:

In the first day the population will decrease to 1530, then 1500 the day 2, 1470 day 3, and so on ...

For decrease and get less than 1000 the mold population needs to be reduced in at least 560. The questions turns to be, how many days will it take to reduce the population in 560 spores?

If we divide 560 between 30 it will gives us the answer:

560/30 = 18.667

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4 0
2 years ago
Find the value of X<br><br> A.66<br><br> B.58<br><br> C.32<br><br> D.68
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1) Δ ABC

m∠B + m∠C + m∠BAC = 180⁰

2) m∠DAB + m∠BAC = 180⁰ because m∠DAB and m∠BAC are supplementary angles.

3) m∠B + m∠C + m∠BAC = m∠DAB + m∠BAC

m∠B + m∠C = m∠DAB

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Answer: A. 66⁰.

8 0
3 years ago
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Moving Company A charges a flat fee of $1200 plus $18 and hour. Company B charges $900 plus $23 an hour. After how many hours wo
sesenic [268]

We need to create two expressions, then equate them in order to find the numbers of hours.


Let X = Number of hours

Let 1200+18x = Company A (Flat Fee + Hourly Rate*Hours)

Let 900+23x = Company B


1200+18x=900+23x\\300+18x=23x\\300=5x\\60=x


After 60 hours, the prices will be the same

6 0
3 years ago
If g(x) = x^2 + 3, find g(4). <br> 11 19 16 8
ValentinkaMS [17]

Answer:

19

Step-by-step explanation:

g(x) = x^2 +3

substituing x for 4,

g(4) = 4^2 + 3

g(4) = 16 + 3

g(4) = 19

7 0
2 years ago
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