Given below is the raw data regarding the weights of 30 students (6 marks)62375054614147515960686338465 8526851686069635953605859656858Prep are a frequency table with one of the intervals 35 –45 and hence represent it by a Histogram. What is the class mark of the last classinterval?

x

step-by-step explanation:

the answer is c)8

step-by-step explanaction:

let's call the solutions x₁ = (5 - 2√7)/3 and x₂ = (5 + 2√7)/3

then the equation is (x-x₁)(x-x₂) = 0

if you fill that in you get a lot of numbers which you can recognize as ax²+bx+c=0.

step-by-step explanation:

you can see that a=1 (there is just an x²)

b = (-5 -2√7 + 2√7 - 5)/3 = -10/3

c = -2√7)/3 ) * (-5+2√7)/3) = -1/3

so your answer is 3x^2 – 10x – 1 = 0

might be the correct answer will be question number 2