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Elena-2011 [213]
3 years ago
15

View the work below from a student last year. What was their mistake? Be detailed in their response.

Mathematics
1 answer:
Fiesta28 [93]3 years ago
3 0
Need to distribute -3

-3(x+4)=2x-5
-3x+12=2x-5
-5x=7
x=-7/5 or x=-1 2/5 or x=-1.4
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If ⅙ of a roll of wallpaper covers ¼ of the wall. How many rolls of paper are needed to cover 4 walls?
AVprozaik [17]

Answer:

if 1/6 of a roll of paper covers 1/4 of a wall, this means that we will need 4/6 of a roll to cover a whole wall, now the question is asking how many rolls will we need to cover 4 walls, we already know that it takes 4/6 to fill one wall so if we add 4/6+4/6+4/6+4/6 we will get 16/6 or 2 4/6

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5 0
2 years ago
A number is 6 times another number and their difference is 30. What are the numbers? ​
Alenkasestr [34]

Answer:

x=36

y=6

Step-by-step explanation:

Let the numbers be x and y

Condition 1

x=6y ----------(1)

Condition 2

x-y=30 ------------(2)

Putting 1 in 2

6y-y=30

5y=30

Dividing both sides by 5

y=6

Now

Putting y=6 in 1

We get

x=6(6)

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8 0
3 years ago
Which equation will be parallel to y=6 A)Y= -6x B)X=6 C)y=1 D)Y=6x
galben [10]

Answer:

A

Step-by-step explanation:

4 0
3 years ago
If 5\9 of a tank can be filled in 2 minutes, how many minutes will it take to fill the whole tank?
Blizzard [7]

Answer:

It would take 3.6 mins.

Step-by-step explanation:

In order to find this, we simply divide the amount of time by the amount of the tank that is filled.

2 ÷ 5/9 = 3.6

7 0
2 years ago
At the kennel, the ratio of cats to dogs is 4:5. There are 27 animals in all.
SpyIntel [72]

Answer:

I don't know how to answer the first question

There are 15 dogs in the kennel

There are 12 cats in the kennel

Explanation:

If there is a 4 to 5 ratio then

12 cats to 15 dogs is linear

3 0
3 years ago
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