Answer:
12
Step-by-step explanation:
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Suppose that the number u were thinking about is x thus :

Multiply both sides by 4



Divide both sides by 3


<h2>
Answer:</h2>

<h2>
Step-by-step explanation:</h2>
To solve this problem, we need to start with the parent function of the exponential function, which is
, where
is the base. In our problem,
, so our parent function here is
. Then, we need to perform some transformations to our parent function. Thus:
1. Vertical shrink:
A vertical shrink is a nonrigid transformation because the graph of the function get a distortion in the shape, so this transformation is as follows:
where
in this problem equals 0.25 because:

2. Vertical shift:
The graph of the function
get a vertical shift given by:

So the graph is shifted 3 units up. So the result is the graph shown above.
For question 3, you needn't worry about the number of total students asked. The question is really just asking you what's 45% as a fraction, which is 9/20. This is because 45% = 45/100, divided by 5 = 9/20.
For question 6, just substitute in the values. So you do 4(7 × 4 - 3 × -7), which gives you 4(28 - -21). Two minuses make a plus, so it's just asking you to do 4 × 49 (because 28 + 21 = 49). The answer is 196.