Answer:

Step-by-step explanation:
Given
The attached triangle
Required
Find y
The attached triangle is isosceles; so:

Also, we have:
--- angles in a triangle
Substitute: 

Collect like terms


Answer:
Company A:
c = 40 + 2s
Company B:
c = 20 + 4s
Equal costs => 40 + 2s = 20 +4s => 4s - 2s = 40 - 20 => 2s = 20 => s = 20/2
=> s = 10
And c = 20 + 4s = 20 + 4(10) = 20 + 40 = 60
Step-by-step explanation:
40 x 10 = 400
400 / 100 = 4
Mai has 4 hundreds.
Answer:
6.25 I think
Step-by-step explanation:
im not really sure but I wish my answer is right
Answer:
∠3=95°
∠4=85°
Step-by-step explanation: