HELP LAST QUESTION I NEED IT AND I WILL MARK BRAINLEST IF RIGHT

Mathematics

2 answers:

galben [10]4 years ago

6 0

The answer is b

There is no solution to the problem because it just doesn’t make sense. You can not add to sides with so many variables and expect to get a answer

3241004551 [841]4 years ago

3 0

The answer for this question is B

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I NEED HELP PLEASE, THANKS!

Finger [1]

Answer:

the 3rd option is the answer

Step-by-step explanation:

I hope the attached file is self-explanatory

3 0

3 years ago

In the right ΔABC, AN is the altitude to the hypotenuse. Find BN, AN, and AC, if AB=2√5 in and NC= 1 in.

kipiarov [429]

Answer:

$BN=4\ \text{in}$

$AN=2\ \text{in}$

$AC=\sqrt{5}\ \text{in}$

Step-by-step explanation:

Let $BN=x$

$BC=c$

$NC=y=1\ \text{in}$

$AB=a=2\sqrt{5}\ \text{in}$

$AC=b$

We have the relation

$\dfrac{BC}{AB}=\dfrac{AB}{BN}\\\Rightarrow \dfrac{c}{a}=\dfrac{a}{x}\\\Rightarrow c=\dfrac{a^2}{x}\\\Rightarrow x+1=\dfrac{a^2}{x}\\\Rightarrow x^2+x=20\\\Rightarrow x^2+x-20=0\\\Rightarrow x=\frac{-1\pm \sqrt{1^2-4\times 1\times \left(-20\right)}}{2\times 1}\\\Rightarrow x=4,-5$