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zmey [24]
3 years ago
13

How to solve -7(-3r+2)=3r-6

Mathematics
1 answer:
Ymorist [56]3 years ago
8 0

Step-by-step explanation:

-7(-3r+2)=3r-6

Distribute the - 7

21r-14=3r-6

Add 14

21r=3r+8

Subtract 3r

18r=8

Divide 18r by 8

2.25 should be the answer to r.

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the train to hogwarts is moving at a speed of 120 mph. if hogwarts is 420 miles away, how long will the students train ride be ?
dexar [7]

Answer:

The train ride is 3.5 hours

Step-by-step explanation:

We know that distance is equal to rate times time

d = rt

We know the distance and the rate

420 = 120*t

Divide each side by 120

420/120 = 120t/120

3.5 =t

The train ride is 3.5 hours

4 0
3 years ago
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Caseys took 25 tests in 135 days at this rate in how many days will she take another 10 test
Butoxors [25]
It will take her 54 days to take 10 more tests
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Y varies inversely with x, if y = -12 when x = 8 what is x when y = -9
Minchanka [31]

Answer:

either 5 or 11

Step-by-step explanation:

(8, -12)

(5, -9) or (11, -9)

If y varies consistently with x then it would copy what happens, in a manner of speaking.

In this case, y increases by three, x would either add 3 or subtract 3

I am not completely sure on this.

8 0
3 years ago
Restrict the domain of f(x) = |x − 3|2 + 2 on which the function is invertible.
andrew-mc [135]
The function is invertible on either side of the vertex. There are many possible answers. Ones that include the vertex are ...

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8 0
3 years ago
2. Mississippi covers a total of 47,691 square
Charra [1.4K]

Answer:

<u>60 people per square mile</u>

Step-by-step explanation:

<u>Given</u> :

  • Population of Mississippi = 2,844,658
  • Area of Mississippi = 47,691 square miles

  • Population density is the rough calculation of people (population) per square mile

<u>Population Density</u>

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5 0
3 years ago
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