If x1=3, x2=12, and x3=30, then what is σxi?

The value of ΣXi will be:

We know that the summation sign represents the sum of two or more quantities.

Here we are asked to find ΣXi , this means that we have to sum up the given variable

We are given:

Hence,

i.e.

                 Hence, the answer is: 45

answer: a. 13/44

step-by-step explanation: judging by the information given to us, we are looking for experimental probability. we can see that 13 males have chosen chocolate ice cream. there are 44 ice creams in total (remember that the total is always the denominator). so our answer is 13/44.

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15