Question

3. what is the value of x?
( i will attach the picture)
a)5
b)2.5
c)7.5
d)10

Answer 1

i'm not sure if you'll understand my method but i'll try
since there are two triangles that are similar, the ratios should be equal
so you set it up like this
\(\LARGE \frac{x}{x-2}=\frac{x+5}{x+1}\)
simplify this and solve for "x"

Answer 2

x=x+1
x-2=x+5
????

Answer 3

\(x(x+1)=(x+5)(x-2)\)
\(x^2+x=x^2+3x-10\)
then solve it algebraically, can you do it from here?

Answer 4

no sorry im not good at math

Answer 5

2xsquared=4xsquared-10

Answer 6

?

Answer 7

@Chibi_Robo3

Answer 8

You should solve
\[
\frac{x}{x+x+5}=\frac{x-2}{x+x+1-2}
\]
for x

Answer 9

im really confused

Answer 10

\[
\frac{x}{2 x+5}=\frac{x-2}{2 x-1}\\
x( 2 x-1) =(x-2)(2x+5)\\
2 x^2 - x=2 x^2+x-10\\
-x= x-10\\
2 x = 10\\
x=5
\]

Answer 11

The answer is a.
What are you confused about?

Answer 12

I can help you

Answer 13

it said math error the first time

Answer 14

Do you get it now?

Answer 15

yeah