Answer:
80
Step-by-step explanation:
240 divided by 3
Answer:
<em>D.) 6 </em>
Step-by-step explanation:
<em>-3+2*6=9</em>
Answer:
The GPA you earn in a particular semester is your Marginal GPA, and your cumalative GPA for all completed semesters is your average GPA.
Step-by-step explanation:
The perimeter of a shape is the sum of its side lengths.
<em>Joshua miscalculated the third length of the triangle</em>
First, we calculate the third length (x) of the triangle.
Because the triangle is right-angled, we can make use of Pythagoras.
So we have:
![x^2 = 7^2 + 7^2](https://tex.z-dn.net/?f=x%5E2%20%3D%207%5E2%20%2B%207%5E2)
![x^2 = 2(7^2)](https://tex.z-dn.net/?f=x%5E2%20%3D%202%287%5E2%29)
Take square roots of both sides
![x = \sqrt{2(7^2)](https://tex.z-dn.net/?f=x%20%3D%20%5Csqrt%7B2%287%5E2%29)
![x = 7\sqrt{2](https://tex.z-dn.net/?f=x%20%3D%207%5Csqrt%7B2)
The other shape in the figure is a square.
So, the perimeter (P) is
---- i.e. the sum of the visible lengths
So, we have:
![P = 7 + 7\sqrt2 + 7\sqrt2 + 7\sqrt2+ 7](https://tex.z-dn.net/?f=P%20%3D%207%20%2B%207%5Csqrt2%20%2B%207%5Csqrt2%20%2B%207%5Csqrt2%2B%207)
Evaluate like terms:
![P = 14 + 21\sqrt2](https://tex.z-dn.net/?f=P%20%3D%2014%20%2B%2021%5Csqrt2)
Hence, Joshua's error is that:
<em>He miscalculated the third length of the triangle</em>
Read more about perimeters at:
brainly.com/question/6465134