<span> X axis is horizontal line so it is 0 </span>
Answer:
Step-by-step explanation:
a² - b² = (a + b) (a - b)
1)x² - 36 = x² - 6² = (x + 6)(x-6)
2) 4x² - 16 = 4x² - 4*4 = 4(x² - 4)
= 4(x² -2²)
= 4(x + 4)(x-4)
3) 9x² -1 = 3²x² - 1² = (3x)² - 1²
=(3x + 1)(3x - 1)
Answer:
z-score = 3.5, Yes, z-score is unusual.
Step-by-step explanation:
Hey there he went 80km because there's 4blocks and 20 minutes are 1/4 of 60 so 240km devided by 3
