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zavuch27 [327]
3 years ago
9

Will mark brainliest!!

Mathematics
1 answer:
wlad13 [49]3 years ago
7 0
<span>Solve the system

9x = 27-9y
20x=71-9y

Let's use the "elimination through addition/subtraction method.
Multiply the first equation by -1 so as to obtain +9y:

-9x = -27 + 9y
</span><span>20x=  71-   9y
--------------------

Add these 2 equations together:

</span>-9x = -27 + 9y
20x=  71-   9y
--------------------
<span> 11x = 44

Solve this for x:  x = 44/11 = 4.

Now find y by subst. 4 for x in either of the original equations.

Using the second equation:    </span><span> 

</span>20x=71-9y
20(4) = 71 - 9y
80-71 = -9y
9 = -9y.  Then y = -1.

The solution set is (4,-1).
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Step-by-step explanation:

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2 years ago
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Solve the inequality 3u+3(u+1)&gt;2u+7 and write the solution in interval notation.
strojnjashka [21]

<u>Given</u>:

The given inequality is 3u+3(u+1)>2u+7

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<u>Solution of the inequality:</u>

The solution of the inequality can be determined by simplifying the inequality.

Thus, we have,

3u+3u+3>2u+7

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Writing it in interval notation, we get;

(1, \infty)

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3 years ago
Find the range of the given data set.<br> -4, -3, -1, -1, 0, 1
Vika [28.1K]

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Step-by-step explanation:

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Therefore :

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2 years ago
vocabulary. use a vocabulary term to complete the definition ---------------are numbers that are easy to compute mentally
erma4kov [3.2K]
I THINK the answer is compatible numbers.............. but I'm pretty sure it is compatible numbers
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3 years ago
If these two shapes are<br> similar, find X
ELEN [110]

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4

Step-by-step explanation:

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