Using the weighed mean formula, it is found that Mara's average for the course was of 68.6.
<h3>What is the weighed mean?</h3>
The weighed mean is given by the <u>sum of all elements in a data-set multiplied by it's weight, divided by the sum of the weights</u>.
In this problem, the weights are as follows:
- A quiz has a weight of 1.
- A test has a weight of 2.
- The final examination has a weight of 4.
Hence, her weighed mean is given as follows:

Mara's average for the course was of 68.6.
More can be learned about the weighed mean formula at brainly.com/question/24398353
Answer: 154
<span>In one side of the glass window measuring 3 ½ feet, we can make (3.5/.25) exactly 14 pieces of a ¼ foot.</span>
The other side of the glass window which measures 2 ¾ feet we can produce (2.75/,25) or 11 pcs of a ¼ foot.
<span>The artist used (14*11) or 154 colored squares.</span>
Answer:
x = 37
Step-by-step explanation:
<u>Step 1: Subtract 5 from both sides</u>
x + 5 - 5 = 42 - 5
x = 37
Answer: x = 37
The answer is negative three halves minus one fifth