Given:
Either has a school certificate or diploma or even both = 20 people
Having school certificates = 14
Having diplomas = 11
To find:
The number of people who have a school certificate only.
Solution:
Let A be the set of people who have school certificates and B be the set of people who have diplomas.
According to the given information, we have
We know that,
Subtract both sides by 25.
We need to find the number of people who have a school certificate only, i.e. 
.
Therefore, 9 people have a school certificate only.
Answer:
20% of the invited people did not attend
Step-by-step explanation:
5 out of 25 people invited didn't attend Glen's party. That means the following:
people didn't come which simplifies to 
Multiply by the giant one 
so the denominator is 100 which is the denominator used to find percentages.
You end up with 
= 20%
Answer:
58°
Step-by-step explanation:
The sum of interior angles is equal to 360° the rectangle has two right angles (right angles has a measure of 90°) and one of the angle is given as 122° so if we add these up
122 + 90 + 90 = 302 and 360 - 302 = 58.
Answer: 0.2
Step-by-step explanation:
subtract 9.38 - 3.5 = 5.88
distribute the 1.2.
7.56 - 8.4x = 5.88
subtract 5.88 - 7.56 = -1.68
-8.4x = -1.68
divide both sides by -8.4
answer = 0.2
