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Mathematics 9 Online
OpenStudy (youngnephew34):

what is the value of x in the diagram? A) 15 B ) 5 2/5 C) 19 D) 3/5

OpenStudy (anonymous):

Diagram?

OpenStudy (youngnephew34):

ok

OpenStudy (youngnephew34):

OpenStudy (youngnephew34):

I put in the diagram

OpenStudy (youngnephew34):

so you do 15+25

OpenStudy (youngnephew34):

or would you do 15x2

OpenStudy (youngnephew34):

so you doing 15x15

OpenStudy (anonymous):

yes because 15x15 is the same thing as 15^2

OpenStudy (youngnephew34):

so it will be 225=625

OpenStudy (anonymous):

Hold on let me check everything first

OpenStudy (anonymous):

Sorry man didnt see the 25 was the hypotenuse(C) What I meant was 25^2-15^2=B^2

OpenStudy (anonymous):

When you get B^2, you find the square root of that, You do the same thing there, but this time its B^2+9^2=X^2 The finally square root of X

OpenStudy (youngnephew34):

9x9=81

OpenStudy (anonymous):

yes

OpenStudy (youngnephew34):

ok I got a different question

OpenStudy (anonymous):

What is it

OpenStudy (youngnephew34):

when you do 625-225=400 and you try 400x400160000

OpenStudy (youngnephew34):

do you do 160000=81

OpenStudy (youngnephew34):

I mean 160000+81

OpenStudy (anonymous):

No after you get 400 you have to find the square root of 400

OpenStudy (youngnephew34):

oh ok

OpenStudy (youngnephew34):

it's 20

OpenStudy (youngnephew34):

so you will do 40+81

Directrix (directrix):

Use the attached theorem to get: x is to 25 as 9 is to 15 x / 25 = 9 / 15 Solve that for x.

OpenStudy (youngnephew34):

121/25 gave me 4.84

OpenStudy (anonymous):

But you really dont have to yet, because then you have to use 20^2*9^2=C^2

Directrix (directrix):

The triangle is not a right triangle. There is no hypotenuse or right angle. The Pythagorean Theorem does not apply here.

OpenStudy (anonymous):

I thought so

OpenStudy (anonymous):

I sort of doubted it

OpenStudy (youngnephew34):

40x81 right or nah

OpenStudy (anonymous):

dont think so

Directrix (directrix):

Solve this for x: |dw:1447120695827:dw|

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