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1 year ago

Daniela recorded the low temperatures during the school day last week and this week. Her results are shown in the table below.

1 answer:

5 0

Based on the information given about the temperature, Daniela made her error on step 3 because it says: "Find the ratio of the differences of the means compared to the mean absolute deviation.

<h3>How to illustrate the error?</h3>

From the information given, it van be seen that Daniela recorded the low temperatures during the school day last week and this week and her results are shown in the table.

Here, she didn't find the difference between the today and last week means. She just put the mean as a whole.

Therefore, Daniela made her error on step 3 because it says: "Find the ratio of the differences of the means compared to the mean absolute deviation. This was the error.

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Here is the answer. Have an amazing day!

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Ine segment AB has endpoints A(–4, –10) and B(–11, –7). To find the x-coordinate of the point that divides the directed line seg

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Answer:

-7

Step-by-step explanation:

The coordinates of the point wich divide the segment AB, where $A(x_A,y_A),\ B(x_B,y_B)$ in ratio $m:n$ can be calculated using formula

$C\left(\dfrac{nx_A+mx_B}{m+n},\dfrac{ny_A+my_B}{m+n}\right)$

In your case,

$A(-4,-10)\\ \\B(-11,-7)\\ \\m:n=3:4\Rightarrow m=3,\ n=4$

Hence,

$C\left(\dfrac{4\cdot (-4)+3\cdot (-11)}{3+4},\dfrac{4\cdot (-10)+3\cdot (-7)}{3+4}\right)\\ \\C\left(-\dfrac{49}{7},-\dfrac{61}{7}\right)\\ \\C\left(-7,-\dfrac{61}{7}\right)$

Therefore, x-coordinate of the point that divides AB into a 3:4 ratio is -7.

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3 years ago

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First, remove parenthesis 4w + 3 -3w + 7

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Plsss help me out and if you can show work if not its ok

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Answer:

$\displaystyle x = 4\sqrt{3}$

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

Multiplication Property of Equality
Division Property of Equality
Addition Property of Equality
Subtraction Property of Equality

Trigonometry

[Right Triangles Only] SOHCAHTOA
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Step-by-step explanation:

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Substitute in variables [cosine]: $\displaystyle cos(30^\circ) = \frac{x}{8}$
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Rewrite: $\displaystyle x = 8cos(30^\circ)$
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