Answer:
13
Step-by-step explanation:
It is a square so the length of 1 side =
= 13
9 = 2(6) - b
9 = 12 - b
-3 = b
Answer:
Nikolaus Otto was responsible for inventing the first working four-stroke engine.
Step-by-step explanation:
Answer:
1. y =
x + 
2. Divide the Opposite of A and B
3. Doesn't make sense the y-intercept is C/By sry I can't help that one
Step-by-step explanation:
1. Ax + By = C
By = -Ax + C
y =
x + 
2. No explanation
4 x 1 thousand (1000) = 4000
21 x 1 ten (10) = 210
4000
+ 210
---------
4210
=4210 (four thousand-two hundred and ten