The theorical probability is 1/4, because there are 4 possible outcome, and they are equally likely to be picked (the sectors have the same area)
The experimental probability is 3/20, becuase the red sector was picked 3 times in 20 trials.
Combine the terms by multiplying into a single fraction.

Find the common denominator.

Combine fractions with the lowest common denominator.

Multiply the numbers.

Combine the multiplied terms into a single fraction

Find the common denominator.

Combine fractions with the lowest common denominator.

Multiply the numbers.

Eliminate the denominators of the fractions.

Cancel the multiplied terms that are in the denominator.

To distribute.

Add 28 to both sides.

Simplify

Subtract 3x from both sides.

Simplify

Divide both sides by the same factor.

Simplify

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<h3>Verification</h3>
Let x=12.









Checked ✅
Answer:
<a = 90° (180-90 supplementary angle)
<b = 90° (180-90 supplementary angle)
<d = 48° (180-132 supplementary angle)
<e = 132° (opposite angle)
<c = 42° (interior angles of a triangle equal 180. 180-48-90=42)
Step-by-step explanation:
<a = 90° (180-90 supplementary angle)
<b = 90° (180-90 supplementary angle)
<d = 48° (180-132 supplementary angle)
<e = 132° (opposite angle)
<c = 42° (interior angles of a triangle equal 180. 180-48-90=42)
1-distributed property
2.Multiplication
3.addition
4.Divison
5.Sum
An example of the ratio 4:1 could be, in a school for every 4 girls there is 1 boy. Or something similar:)