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3 years ago

Which step can be used to prove that triangle EFG is also a right triangle?

Mathematics

1 answer:

Darya [45]3 years ago

8 0

EFG is the same as angle KLM. therefore, it is the reflection of the angle KLM

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Graph the linear equation. Find three

Sever21 [200]

Y=1/3x+2
(-6,0)
(0,2)
(6,4)

6 0

3 years ago

A: What are the solutions to the quadratic equation x2+9=0? B: What is the factored form of the quadratic expression x2+9? Selec

Paraphin [41]

Answer:

A. The solutions are $x=3i,\:x=-3i$ .

B. The factored form of the quadratic expression $x^2+9=(x-3i)(x+3i)$

Step-by-step explanation:

A. To find the solutions to the quadratic equation $x^2+9=0$ you must:

$\mathrm{Subtract\:}9\mathrm{\:from\:both\:sides}\\\\x^2+9-9=0-9\\\\\mathrm{Simplify}\\\\x^2=-9\\\\\mathrm{For\:}x^2=f\left(a\right)\mathrm{\:the\:solutions\:are\:}x=\sqrt{f\left(a\right)},\:\:-\sqrt{f\left(a\right)}\\\\x=\sqrt{-9},\:x=-\sqrt{-9}$

$x=\sqrt{-9} = \sqrt{-1}\sqrt{9}=\sqrt{9}i=3i\\\\x=-\sqrt{-9}=-\sqrt{-1}\sqrt{9}=-\sqrt{9}i=-3i$

The solutions are:

$x=3i,\:x=-3i$

B. Two expressions are equivalent to each other if they represent the same value no matter which values we choose for the variables.

To factor $x^2+9$ :

First, multiply the constant in the polynomial by $i^2$ where $i^2$ is equal to -1.

$x^2+9i^2$

Since both terms are perfect squares, factor using the difference of squares formula

$a^2-i^2=(a+i)(a-i)$

$x^2+9=x^2+9i^2=\left(-3i+x\right)\left(3i+x\right)$

5 0

3 years ago

I’ll give brainiest

ElenaW [278]

Answer:

8.33333cm

Step-by-step explanation:

Using the formula

A=wl

Solving forw

w=A/L

=125/15

≈8.33333cm

8.3cm to the nearest tenth

correct so pls mark brainliest

7 0

2 years ago

There are 7 terms in a finite arithmetic sequence, and the first term is 11.

jonny [76]

I say the answer is d I might be wrong.

4 0

3 years ago

The distance between Dallas and Fort Worth on a map is 7.5 centimeters. The map uses a scale in which 1 centimeters represents 3

anyanavicka [17]

Hi There

To find the distance, you have to make them proportional to each other.

1 cent. / 30 kilo. = 7.5 cent. / x

Then you cross multiply.

30 x 7.5 = x

225 = x

The distance between the two cities is 225 kilometers.

Hope that helps:)

Read more on Brainly.com - brainly.com/question/11599824#readmore

6 0

3 years ago