Answer:
35
Step-by-step explanation:
Alright this is like a linear pair. All three angles add up to 180; so this is the set up:
40 + 2x + 30 + 40 = 180
2x + 110 = 180
2x = 70
x=35
For the first image can you give us the choices for each one?
Answer:
![\frac{2A}{h} = b](https://tex.z-dn.net/?f=%5Cfrac%7B2A%7D%7Bh%7D%20%3D%20b)
Step-by-step explanation:
- this can be done by simple manipulation .
- in the given equation, A is the subject.
- so, by the above statement you can understand the meaning of making something as a subject.
- given equation: A = 1/2 bh
- multiply both the sides by 2,
2A = bh
- divide both the sides by h,
![\frac{2A}{h} = b](https://tex.z-dn.net/?f=%5Cfrac%7B2A%7D%7Bh%7D%20%3D%20b)
so, the required form is : ![\frac{2A}{h} = b](https://tex.z-dn.net/?f=%5Cfrac%7B2A%7D%7Bh%7D%20%3D%20b)
Answer:
x + y = 20
x - y = 4
Add the 2 equations and get
2x = 24
x = 24/2 = 12
Plug x=12 into either equation and get
y = 8