Ella’s geometry teacher asked each student to devise a problem and write out its solution. Here is Ella’s work:

Mathematics

2 answers:

Zigmanuir [339]4 years ago

5 0

Answer:

Ella’s procedure and conclusion are incorrect.

Step-by-step explanation:

The sum of the squares of the short sides can be compared to the square of the long side to see if the triangle is acute, right, or obtuse. The appropriate conclusions are ...

a² +b² > c² -- acute triangle
a² +b² = c² -- right triangle
a² +b² < c² -- obtuse triangle

For Ella's side lengths, the appropriate "work" is ...

10² +11² ?? 15²

100 +121 < 225

The triangle is obtuse.

Ella used an incorrect comparison and came to the wrong conclusion. Both her procedure and conclusion are incorrect.

mixer [17]4 years ago

5 0

Answer:

Step-by-step explanation:

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Slope=-3 goes through (1,2) whats the equation

dedylja [7]

Hi student, let me help you out! :)

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We are asked to find the equation of the line, using the given information:

$\star~\mathrm{-3}$ , which is the slope

$\star~\mathrm{(1,2)}$ which is a point that the line contains

$\triangle~\fbox{\bf{KEY:}}$

The slope is the number before x, in the form $\mathtt{y=mx+b}$ .

Since "m" is the slope, and we're given what the slope is, we can substitute -3 for m:

$\dag~\mathtt{y=-3x+b}$

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Now, we need to find the y intercept, "b", of the line.

Here's how it's done:

Remember the point that the line contains, (1,2)?

Well, its y-coordinate is 2; so what we do is substitute 2 for y:

$\dag~\mathtt{2=-3x+b}$