Difference between the area of the triangle and square is 25
Step-by-step explanation:
- Step 1: Find the area of the triangle given its 3 sides using the Heron's formula.
Area of the triangle = 
where s = 
⇒ s = (6 + 8 + 10)/2 = 24/2 = 12
= 
= 
= 
= 24 sq. units
- Step 2: Find the area of the square with perimeter = 28 units.
Perimeter of the square = 4 × side = 28
⇒ Side of the square = 28/4 = 7 units
⇒ Area of the square = (side)² = 7² = 49 sq. units
- Step 3: Find the difference between the area of the square and triangle.
Difference = 49 - 24 = 25
Answer:
f(-3) = 4(-3) + 5 = -12 + 5 = -7. the answer is #2.
Answer:
Yep, looks like a legit problem to me
Step-by-step explanation:
Her weighted mean grade is 81.2% if the student earned grades of 84, 78, 84, and 72 out of 100 on her four regular tests.
<h3>What is mean?</h3>
It is defined as the single number that represents the mean value for the given set of data or the closed value for each entry given in the set of data.
We have a student who earned grades of 84, 78, 84, and 72 out of 100 on her four regular tests. She scored 78% on the final exam and 86% on her class projects.
The weighted mean can be calculated as:
![\rm = 0.4\times\dfrac{[(84+78+84+72)]}{4} + 0.3\times 78 + 0.1\times 86+ 0.2\times 87](https://tex.z-dn.net/?f=%5Crm%20%3D%200.4%5Ctimes%5Cdfrac%7B%5B%2884%2B78%2B84%2B72%29%5D%7D%7B4%7D%20%2B%200.3%5Ctimes%2078%20%2B%200.1%5Ctimes%2086%2B%200.2%5Ctimes%2087)
After calculating, we get:
= 81.2%
Thus, her weighted mean grade is 81.2% if the student earned grades of 84, 78, 84, and 72 out of 100 on her four regular tests.
Learn more about the mean here:
brainly.com/question/22871228
#SPJ1
