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3 years ago

Can you help me? I don't understand this

Mathematics

1 answer:

hodyreva [135]3 years ago

7 0

63.99 your welcome I hope it's write

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i honeslty dont know but good luck have agood night

Step-by-step explanation:

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3 years ago

Solve for n: 1-5|n-9|=-74 I need answer by 12:10, please help!!!

Dovator [93]

The answer is -6, 24

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3 years ago

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while installing a window in an older home, you find that the measurements are not square and will need to shim one side. you fi

Masja [62]

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while installing a window in an older home, you find that the measurements are not square and will need to shim one side. you find a packet of shims that have 0.25 inch marked on the outside of the wrapper. What fraction of an inch is 0.25, reduce to its lowest terms 0.30

Step-by-step explanation:

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3 years ago

Plss help me find this hcf 3a-6,a²-4

aleksklad [387]

Step-by-step explanation:

1st expression = 3a - 6 = 3 ( a - 2 )

2nd expression = a² - 4 = a² - 2² = ( a + 2) (a - 2)

The HCF is (a -2).

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3 years ago

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Janet is training for a marathon. She decides to track her time per mile, in minutes, for 8 weeks. Which equation best fits the

Anna007 [38]

Answer:

$y=-0.18 x+10.06$

Step-by-step explanation:

The nine coordinates are $(0,10)$ , $(1,9.9)$ , $(2,9.6),(3,9.5), (4,9.4), (5,9.2), (6,9), (7,8.7), (8,8.6)$

To find the line that best fit the data is to substitute the values in this equation $y=a x+b$ where $a=\frac{\left(N * \sum x y\right)-\left(\sum x * \sum y\right)}{\left(N * \sum x^{2}\right)-\left(\sum x * \sum x\right)}$ and $b=\frac{\left(\sum x^{2} * \Sigma y\right)-\left(\sum x * \Sigma x y\right)}{\left(N * \Sigma x^{2}\right)-\left(\sum x * \Sigma x\right)}$

Using the values from the table attached below, we can substitute and find the values of a and b

Substituting the values of a, we get,

$\begin{aligned}a &=\frac{\left(N * \sum x y\right)-\left(\sum x * \Sigma y\right)}{\left(N * \sum x^{2}\right)-\left(\sum x * \sum x\right)} \\&=\frac{(9 * 324.9)-(36 * 83.9)}{(9 * 204)-(36 * 36)} \\&=-0.18\end{aligned}$

Similarly, substituting the values of b, we get,

$\begin{aligned}b &=\frac{\left(\sum x^{2} * \Sigma y\right)-\left(\sum x * \sum x y\right)}{\left(N * \sum x^{2}\right)-\left(\sum x * \sum x\right)} \\&=\frac{(204 * 83.9)-(36 * 315)}{(9 * 204)-(36 * 36)} \\&=10.06\end{aligned}$

Thus, substituting the values of a and b in the formula, we get,

$\begin{aligned}y &=a x+b \\&=-0.18 x+10.06\end{aligned}$

8 0

3 years ago