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natita [175]
2 years ago
11

Please answer quick!!​

Mathematics
2 answers:
vesna_86 [32]2 years ago
6 0
Are those X’s or K’s
Debora [2.8K]2 years ago
3 0

Answer:

x = 33 + 11y

Step-by-step explanation:

12x + 13y = 36

13x + 2y = 69

One of the needs to change so that an x or y is the subject of the equation.

36 - 12x = 13y

13x + 2y + 36 - 12x = 69 + 13y

x + 2y + 36 = 69 + 13y

x + 2y + 36 - 36 = 69 + 13y - 36

x + 2y = 13y + 33

x + 2y - 13y = 13y - 13y + 33

x - 11y = 33

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56x7 divided by 10 will give 15 ppoints
Flura [38]

Answer:

39.2

Step-by-step explanation:

56 × 7 = 392

392 / 10 = 39.2

3 0
3 years ago
Read 2 more answers
There were 16 stairs.carlos walked halfway up.how many steps did he climb
ololo11 [35]
The answer is 8.
half of 16 is 8
3 0
3 years ago
I got c which is 100 but I don’t know how jerry got A
Anna007 [38]

Choice C is the correct answer because

\frac{(6+2)^3-12}{5}\\\\\frac{(8)^3-12}{5}\\\\\frac{512-12}{5}\\\\\frac{500}{5}\\\\100\\\\

So in short, \frac{(6+2)^3-12}{5}=100\\\\

------------------------------------------

The mistake Jerry likely made was that he only cubed the 2 and didn't realize the 6 was part of that cubing process. It seems he didn't add first and decided to cube before adding.

This is probably what steps Jerry did

\frac{6+2^3-12}{5}\\\\\frac{6+8-12}{5}\\\\\frac{14-12}{5}\\\\\frac{2}{5}\\\\

But as mentioned, those steps are incorrect because the 6 is part of the cubing operation. In other words, Jerry should have added the 6+2 first before cubing afterward (due to PEMDAS determining the order of operations).

Or you could think of it like this

\frac{(6+2)^3-12}{5}\\\\\frac{(6+2)(6+2)(6+2)-12}{5}\\\\\frac{(8)(8)(8)-12}{5}\\\\\frac{512-12}{5}\\\\\frac{500}{5}\\\\100

4 0
2 years ago
Can someone please please PLEASEEE. Help me on this one
Furkat [3]

Answer:

256 total

Step-by-step explanation:

112 boys

144 girls

3 0
3 years ago
3(n+4)=21 what does n =?
Brilliant_brown [7]

Answer:

3.

Step-by-step explanation:

3(n + 4) = 21

3n + 12 = 21

3n = 21 - 12 = 9

n = 3.

7 0
3 years ago
Read 2 more answers
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