Log, (x + y)=log, y, log, x .
Solve for question D only

4.

Step-by-step explanation:

Change of base formula is

logb x = loga x / loga b

So logx 25 = log5 25 /log5 x

Now log5 25 = log5 5^2 = 2, so:

logx 25 = 2 / log5 x

So log5 x^2 * logx 25

= log5 x^2 * 2 /log5 x

= 2 log5 x * 2 / log5 x

= 4.

For number 20: -26, -17, 0, 3, 15

For number 21: -16, -13, -8, 7, 9

For number 22: -54, -41, -33, 20, 48

Tip: Remember that the negatives are always last! It is the least of the numbers after all.