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4 years ago

Ms. Eskew's class had a class average of 89 % on their Math test. How would this be written as a ratio?

Mathematics

1 answer:

noname [10]4 years ago

5 0

It would be written as 89/100

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2.1 x 10^10 OVER 7 x 10^17

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2.1 x 10^10/ 7 x 10^17
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Use your calculator to work out this equation

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Step-by-step explanation:

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What is the area of a triangle with vertices (1,0) (5,0) (3,4)

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The area of the triangle is of 8 units of area.

Step-by-step explanation:

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The area of the triangle is of 21 units of area.

Step-by-step explanation:

The area of a triangle with three vertices $(x_1,y_1),(x_2,y_2),(x_3,y_3)$ is given by the determinant of the following matrix:

$A = \pm 0.5 \left|\begin{array}{ccc}x_1&y_1&1\\x_2&y_2&1\\1_3&y_3&1\end{array}\right|$

In this question:

Vertices (1,0) (5,0) (3,4). So

$A = \pm 0.5 \left|\begin{array}{ccc}1&0&1\\5&0&1\\3&4&1\end{array}\right|$

$A = \pm 0.5(1*0*1+0*1*3+1*5*4-1*0*3-0*5*1-1*1*4)$

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