Answer:
84
Step-by-step explanation:
The mean is calculated as
mean = , then
= 21 ( multiply both sides by 4 )
sum = 84
The Martinez family has $1543 a month income. They have $978 and fixed expenses, money they have to spend. How much money do the
1 answer:
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Recall the following formula:
Given a triangle with side lengths a, b, and c. Let the measure of the angle between sides of length a and c be B.
Then, the area of the triangle is given by :
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In our example we have: Area=10 square cm, a=8 cm, c=5 cm, and we want to find the measure of the angle between the 2 sides a and c.
Substituting in the formula we have:
Thus,
, which means 
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is the sine of 
, but also 
.
Answer: both 30, and 150 degrees are possible
Given a triangle with side lengths a, b, and c. Let the measure of the angle between sides of length a and c be B.
Then, the area of the triangle is given by :
In our example we have: Area=10 square cm, a=8 cm, c=5 cm, and we want to find the measure of the angle between the 2 sides a and c.
Substituting in the formula we have:
Thus,
Answer: both 30, and 150 degrees are possible