The mean is 52 because 42+45+58+63=208 then you divide it by the amount of numbers: 4 : 208 divided by 4= 52
Answer: 3rd one
Rearrange the original equation so it fits the model of : ax^2+bx+c=0
Then use the quadratic formula to find all possible answers.
I just did one of these. I guessed that normal form is
Here' that's
Choice b
Answer:
Perimeter = 89mm
area= 528 or 220
Step-by-step explanation:
hope this is useful