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skad [1K]
3 years ago
7

It is currently 0 degrees outside and the temperature is dropping 4 degrees every hour. The temperature after h hours is -4h. Ex

plain what the equation -4h = -14 represents.
_______________
What value of “h” makes this equation true?
_______________
Mathematics
2 answers:
Ymorist [56]3 years ago
6 0

Answer:

-4x3.5=-14

Step-by-step explanation:

divide -14 by -4 wich = 3.5

Marianna [84]3 years ago
4 0
- 4x3.5= - 14

Explanation : if you divide - 14 with - 4 it equals to 3.5
Sorry if I get this wrong
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Find the volume of the parallelepiped with adjacent edges t = 3j – 4j – 6k, u = 3i – 7j – 7k and v = 5i + j + 3k.
Assoli18 [71]

Answer:

94 cubic units

Step-by-step explanation:

The volume of this parallelepiped (the product of area of its base and height) is equal to the absolute value of the scalar triple product |\vec{t}\cdot (\vec{u}\times \vec{v})|

Since

\vec{t}=3\vec{i}-4\vec{j}-6\vec{k}=(3,-4,-6)\\ \\\vec{u}=3\vec{i}-7\vec{j}-7\vec{k}=(3,-7,-7)\\ \\\vec{v}=5\vec{i}+\vec{j}+3\vec{k}=(5,1,3)

we have

|\vec{t}\cdot (\vec{u}\times \vec{v})|=\left|\left|\begin{array}{ccc}3&-4&-6\\3&-7&-7\\5&1&3\end{array}\right|\right|=|3\cdot (-7)\cdot 3+(-4)\cdot (-7)\cdot 5+3\cdot 1\cdot (-6)-5\cdot (-7)\cdot (-6)-3\cdot (-7)\cdot 1-3\cdot (-4)\cdot 3|=|-63+140-18-210+21+36|=|-94|=94\ un^3.

4 0
3 years ago
Just help me plssssssssss
Komok [63]

Answer:

The perimeter of triangle is 30ft.

Step-by-step explanation:

First you have to find the value of a using Pythogoras Theorem, a² + b² = c² where a and b is the sides and c is the hypotenuse :

{a}^{2}  +  {b}^{2} =   {c}^{2}

{a}^{2}  =  {c}^{2}  -  {b}^{2}

a =  \sqrt{ {c}^{2} -  {b}^{2}  }

Let b = 12,

Let c = 13,

a =  \sqrt{ {13}^{2} - 12 {?}^{2}  }

a =  \sqrt{25}

a = 5feet

Next you have to find the perimeter of triangle by adding all the sides together :

perimeter = 5 + 12 + 13

perimeter = 30feet

7 0
3 years ago
Zarah earns a weekly salary of $545 plus a commission of 8.5% on sales at the clothing store she works at. How much would she ma
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Answer:

$638.50

Step-by-step explanation:

1100*0.085=93.5

545+93.5=638.5

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3 years ago
Miles is throwing three darts at the board shown below. His score is the sum of all three darts. How many different possible tot
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A trust me even tho I’m in the 7th grade :)
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I hope this helps you

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4 years ago
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