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Anni [7]
3 years ago
15

Solve the system by substitution x=9y and x-5=20

Mathematics
1 answer:
gtnhenbr [62]3 years ago
6 0

Answer: y=2.7

Step-by-step explanation:

Since x=9y and  substitution,

plug the 9y in where x is in the equation like so,

9y-5=20

Now get the variable by itself

To do this you add 5 to both sides of the equal sign

5+(-5) cancels out and 20 +5 =25

Now isolate the varaible by dividing  9y from both sides

So, 9y=25

     9/9=1 so you leave it as y

and 25/9 is 2.77777

therefore y=2.7

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Simply plug in the coordinates into the formula:

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3 years ago
Mina tossed two number cubes labeled 1 to 6.What is the probability that the sum is equal to 5
valentinak56 [21]
Hello there!

Firstly, let's figure out the total number of possible outcomes there are.
6 x 6 = 36

Therefore, the answer would be something out of 36.

The possible our comes that would make the sum of 5 would be:
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So there are 4 possible outcomes that would make the sum of 5.


The answer would be 4/36.
However, you have to simplify the answer.
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Thus, the final answer is 1/9



Hope this helped :D
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