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BARSIC [14]
3 years ago
6

15. Solve: 21-3y=36-6y A) 19 B) 5 C) -5/3 D) -19

Mathematics
2 answers:
juin [17]3 years ago
6 0
<span>21-3y=36-6y        +3y
21 = 36 - 3y          -36
-36+21 = -3y
- 15 = - 3y              ÷ -3
5 = y

Choice: B


</span>
pav-90 [236]3 years ago
6 0
21 - 3y = 36 - 6y

We're essentially just trying to get both of the "y's" with one another on the same side.

So, we must add 6y to both sides.

21 -3y + 6y = 36

Now, we must subtract 21 from both sides.

-3y + 6y = 36 - 21

Simplify.

3y = 15

Divide both sides by 3.

y = 15/3

y = 5

So, B) 5 is correct

~Hope I helped!~
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Can someone plz help me
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Answer:

Your table might look something like this:

The dads steps:

3

6

9

12

15

18

Sons steps:

5

10

15

20

25

30

You can notice the pattern. If dad walks 3 steps, son walks 5. If dad walks another 3, son walks another 5. And so on. This means dad walks 12 steps when the sin walks 20 steps.

Step-by-step explanation:

The ratio is 3:5. This means dad wlaks 3 steps so son must walk 5 steps basically. So.......... You can now create the table. Y I just have to multiply or divide each side ( of the colon:) so. Whatever you do to one side, you do to the other side. If you x3 on one side, you do it to other. Same goes for division. In the 'table' I did above, I x2 to get 6 and 10. Then I took the 3 and the 5 again and timsed those by 3. You can also change the 6 and the 10. So:

3:5

Then x2

6:10

Then I take the top layer (you can either choose to change the top layer, or layer above as long as you do the same thing to each side. Remember, only x and ÷. No + or-.) and I x3

9:15

Then I could take 9 and 15 and x5

45:75

It's crazy that all these. Ratios mena the same thing! 45 steps from dad would take the son 75 steps. You can also divide the last ratio of 45:75 to find the one you started with, 3:5.

So you get the idea.

It is probably best to do what I did in the table in the answer part because I did a pattern. Take the top layer, and x2, then x3, then x4, ect. Rather then doing random things.

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3 years ago
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katovenus [111]
The sign would be negative

X is in the negative area meaning that when x/y and multiplied by y, it would stay negative since y is positive
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