Assist me with this problem part 2

2sqrt(x² + 81) + 18

Step-by-step explanation:

AB = BC = sqrt(x² + 9²)

Perimeter = AB + BC + AC

2sqrt(x² + 81) + 18

Where sqrt: square root

the sum of all the angles in a triangle are equal to 180

so you can add   the 3 given angles together to equal 180:

5y + 2y + 2y = 180

or since all three angles have the same letter, combine the 3 angles to equal 180:

9y = 180

$450

step-by-step explanation:

first, you have to multiply 150x2=300

next, you have to add 150+300= 450