Answer:
Step-by-step explanation:
To find the distance between two points, use the distance formula.
The distance formula is:
Let (3,-4) be x₁ and y₁ and let (5,4) be x₂ and y₂. Therefore:
Simplify:
Square:
Add:
Simplify:
Simplify:
She needs to score a 91 on her next test because 85+78+77+69+91=400 and 400 divided by 5 gives you a mean of 80.
The most-specific name for such a polygon is square.
It can also be called a <em>rectangle</em>, <em>rhombus</em>, <em>parallelogram</em>, or <em>quadrilateral</em>.
I made this graph for you- the red is the 80%, and the green is the leftover 20%.