(15, -8) :)
From C to midpoint you do (+10, -7), so you have to do that again to get to D
Pi aka 3.14 is a very commonly know irrational number
Two and one thirds will be located between 2 and 3.
hope this helps :)
steps
(x) = 5x^2-3x+7
refine
x=5x^2-3x+7
Switch sides
5x^2-3x+7-x=x-x
Subtract x from both sides
5x^2-4x+7=0
Solve with the quadratic formula
Answer: 89
Step-by-step explanation: First find the mean add all the numbers up and divide by the amount of numbers. 641/7 is 91.57. She needs at least atleast a 89.