By definition, if :


<span>We highlight the following elements:
</span><span>a = Base of the logarithm;
b = logarithmand or antilogarithm
y = logarithm</span><span>
Therefore:
</span><span>Note that since the base was not specified, we know that it is equal to 10.
</span>



<span>
Answer:
</span>
Base of the logarithm = 10
Answer:
$82.5
Step-by-step explanation:
$82.5
Step-by-step explanation:
We can calculate it with a direct rule of 3. As it has a 30% off, the remaining price is the 70% and we want to know how much is the 100%
We use the formula of the direct rule of 3
x = 82.5
The original price of the stereo was $82.5
Answer:
y = -3x + 8
Step-by-step explanation:
You have to find the slope first using the formula 
Insert any two points in the equation (1,5) and (2,2) and you get -3.
Then, you do any x value times the slope (1*-3 = -3) and add so that it equals the corresponding y value (8).
This makes it y = -3x + 8.
Answer: 36:60
Step-by-step explanation:
3x20=60,3x12=36
Second one, and can I have brainelist,please, and thanks