3. X= y-3
You subtract 3 to the other side to make X the subject of the formula.
21x squared, just add the numbers together
Answer:
280 m
Step-by-step explanation:
a² + b² = c²
450² + b² = 530²
202,500 + b² = 280,900
280,900 - 202,500 = 78,400
√78,400 = 280