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LiRa [457]
3 years ago
9

(this is 6 grade math) PLEASE HELP​

Mathematics
2 answers:
pochemuha3 years ago
8 0
Answer
11a + 4a= 15a
3x + 6 +7x -4 = 12x
-12m -3 + 4m + 16 = 29m
6k-4+k-2 =4K
3+13-5p-2p =9p

I think these are the answers please don’t get mad if they are not hope I help :)
zubka84 [21]3 years ago
4 0
11a+4a=15 a
3x+6+7x-4= 10x+2
-12m-3+4m+16=-8m+13
6k-4+k-2= 7k-6
3+13-5p-2p=-7p +16
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If the function f(x) = -1/2x - 7 were graphed, which of the following would be true?
Fittoniya [83]
ANSWER

D. As the x-values increase, the y-values would decrease

EXPLANATION

The given function is
y =  -  \frac{1}{2} x - 7


The slope of this function is
m =  -  \frac{1}{2}

Since the slope is negative, there is a negative or an inverse relationship between x and y.

As the values of x increases, the values of y decreases.

Also, as the values of x decreases, the values of y increases.

The first option is not true because as x is becoming bigger and bigger negatively, y will become positive.

For instance, when
x =  - 40
y =  -  \frac{1}{2} ( - 40) - 7


This implies that,

y = 20 - 7 = 13

Options B is obviously not true because the function has a negative relationship between x and y.


Option C is also false because, x can be positive since it is the independent variable.

See graph



Therefore, the correct answer is option D.




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3 years ago
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ANEK [815]
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3 years ago
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Nookie1986 [14]
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3 years ago
A study has indicated that the sample size necessary to estimate the average electricity use by residential customers of a large
Zanzabum

Answer:

\sigma=547.1125

Step-by-step explanation:

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ME=z_{\alpha/2}\times \frac{\sigma}{\sqrt{n}}\\\\

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ME=z_{\alpha/2}\times \frac{\sigma}{\sqrt{n}}\\\\\\30=1.645\times\frac{\sigma}{\sqrt{900}}\\\\\sigma=\frac{30^2}{1.645}\\\\=547.1125

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Answer:

57/4

Step-by-step explanation:

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3 years ago
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