What is 12-11a=45
What is a?

100 points

a = -3

Step-by-step explanation:

Simplifying

12 + -11a = 45

Solving

12 + -11a = 45

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '-12' to each side of the equation.

12 + -12 + -11a = 45 + -12

Combine like terms: 12 + -12 = 0

0 + -11a = 45 + -12

-11a = 45 + -12

Combine like terms: 45 + -12 = 33

-11a = 33

Divide each side by '-11'.

a = -3

Simplifying

a = -3

the arc length is found by finding the circumference of the full circle (2xpixradius) and then dividing by 4 to find just one quarter of the circle (90 degrees).