If you could give a sample question I think it would be easier to explain
The mistakes that Joan made are:
- The y-axis does not start from zero.
- The width of the bars are not equal.
- The space between the bars are not equal.
<h3>What is a bar chart?
</h3>
A bar chart is a graph that shows the numerical values of variables represented by the height rectangles of equal width.
In a bar graph, the rectangles must be of equal width and the space between each bars must be equal.
Please find attached an image of the bar chart. To learn more about bar charts, please check: brainly.com/question/18092827
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Answer:

Step-by-step explanation:
Hi there!
Let <em>t</em> equal the total number of muffins.
⇒ This represents freezing the 6 muffins
⇒ This represents sharing the remaining muffins among 3 people
Therefore, the expression would be
.
If you would like to change this into an equation, it would be
, where <em>m</em> is the number of muffins that each person gets.
I hope this helps!
Double angle formulae involve trigonometric functions of double angles and in order to get its value you must consider the following:
-derive the double angle formula from additional formula
-write the formula for the angle in alternative form
-use the formula to write trigonometric expressions in different forms
-use the formula in the solution of trigonometric equations
And the answer would be 4sin(theta)cos(theta)cos(2theta)