What is the perimeter of isosceles triangle abc? (1) the length of side ab is 9 (2) the length of side bc is 4

9+9+4= 22

Assuming you draw triangle A on top

Hello there ^ _ ^

The formula is : P = a + b + c
It is a triangle isosceles which means AB = AC
We have AB = 9  AC = 9  = BC = 4
All we have to do is add them all together.
P = 9 + 9 + 4
P = 22

I hope this help! 

Fraction = 4/7

Step by step Explanation

Let the denominator be x.

Numerator = 3 less than denominator

denominator = x

Numerator = (x – 3)

Now, Adding 5 to denominator

adding 2 to numerator.

Numerator = (x – 3 + 2)

Denominator = (x + 5)

(x – 3 + 2)/(x + 5)

According to the question

 (x – 3 + 2)/(x + 5) = 1/2

(x – 1)/(x + 5) = 1/2

2(x – 1) = 1(x + 5)

2x – 2 = x + 5

2x – x = 5 + 2

x = 7

So,

=> Denominator x = 7

=> Numerator (x – 3) => (7 – 3) = 4

= > Fraction = 4/7