Answer:
→ Mean of given data = xi = (86 + 49 + 63 + 90 + 82 + 98 + 36) / 7 = 504 / 7 = 72 .
→ variance of the set of data = 525
Step-by-step explanation:
Hope it is helpful....
Answer:
Alyssa walked 200 ft more than Miki.
Step-by-step explanation:
According to the Pythagorean theorem formula if we square the a(400) and b(300) and add them both we would get 250,000. From then you square root it to 500. So Miki walked 500ft and Alyssa walked 700ft (400+300). Subtract 500 from 700 and you would get 200ft.
Coefficient is (-5)(-4) = 20.
Expo of x in the product is (x)(x^2) = x^3. That of y is (y^2)(y) = y^3.
Please, use "^" to denote exponentiation, as I have.