This is a simple consequence of the Zero-sum problem: https://en.wikipedia.org/wiki/Zero-sum_problem
Answer:
2. is not an equation
Step-by-step explanation:
An equation always has an equal sign. An expression doesn't
Hypotenuse² = perpendicular² + base²
H² = 20²+21²
H²= 400+441 = 841
H = √841
H = 29 cm
Answer:
5.
Step-by-step explanation:
x axis is the same. do 7-2. Which equls 5.
