Answer:
not equivalent
Step-by-step explanation:
solve for x
4-5x=24
-5x=20
x = - 4
5x=20
x = 4
no they are not equivalent
Answer:

--- Variance
Step-by-step explanation:
Given

Solving (a): Calculate the mean.
The given data is a grouped data. So, first we calculate the class midpoint (x)
For 51 - 58.

For 59 - 66

For 67 - 74

For 75 - 82

For 83 - 90

So, the table becomes:

The mean is then calculated as:



-- approximated
Solving (b): The sample variance:
This is calculated as:

So, we have:


-- approximated
Answer:
14 one 15 6
Step-by-step explanation:
Y = log3 27
27 = 3^x
3^3 = 27
so x = 3
First multiply each term by 24(the common denominator found by 8×3) to remove the fractions and make things easier.

This will give you,

Then just continue to simplify and isolate the variable.


