$10d ≥ $800 Your answer is D
[they get $10 per donation(d), and they need at least $800 (that is the minimum, so they can raise more than $800).]
Answer:

Step-by-step explanation:
The parabola's are


So



So, the points at which the parabola's intersect each other is
and 
The three points of the triangle are
,
and 
Area of a triangle is given by
![A=\dfrac{1}{2}[x_1(y_2-y_3) + x_2(y_3-y_1) + x_3(y_1-y_2)]\\\Rightarrow A=\dfrac{1}{2}[2(5-0)+(-2)(0-5)+0(5-5)]\\\Rightarrow A=10\ \text{sq. units}](https://tex.z-dn.net/?f=A%3D%5Cdfrac%7B1%7D%7B2%7D%5Bx_1%28y_2-y_3%29%20%2B%20x_2%28y_3-y_1%29%20%2B%20x_3%28y_1-y_2%29%5D%5C%5C%5CRightarrow%20A%3D%5Cdfrac%7B1%7D%7B2%7D%5B2%285-0%29%2B%28-2%29%280-5%29%2B0%285-5%29%5D%5C%5C%5CRightarrow%20A%3D10%5C%20%5Ctext%7Bsq.%20units%7D)
Area of the triangle formed is
.
Answer:
3x4=12
12 coins in her collection
Step-by-step explanation:
25x4=100%
Answer: d. 10
Step-by-step explanation:
We know that the number of combinations of r objects selected from a group of n objects at a time is given by :-

Given : The total number of letters = 5
The number of letters need to select = 2
Then , the number of combinations of 2 letters selected from a group of 5 letters at a time is given by :-

Hence, there are 10 possible selections.
Answer:
2/5
Step-by-step explanation:
3/5*2/3=6/15=2/5