Answer:22
x-10=12
x= 10+12
x=22
m<3 =72°
This is because m<1 and m<3 are vertically opposite.
One stratagie you can use is called the big 7
Answer:

Step-by-step explanation:
we know that
The quadratic equation in standard form is equal to

we have

This is a quadratic equation in vertex form
Convert to standard form

Apply distributive property

Combine like terms
----> quadratic equation in standard form