Answer:
There are 210 ways
Step-by-step explanation:
The number of ways or combinations in which we can select x elements from a group of n elements where the order doesn't matter can be calculated as:
![nCx=\frac{n!}{x!(n-x)!}](https://tex.z-dn.net/?f=nCx%3D%5Cfrac%7Bn%21%7D%7Bx%21%28n-x%29%21%7D)
So, we have 10 teaching assistants and we need to choose 4 (one assistant per question) to grade each question. It means that n is equal to 10 and x is equal to 4.
Therefore, the number of ways that the assistants can be chosen to grade the exam are calculated as:
![10C4=\frac{10!}{4!(10-4)!}=210](https://tex.z-dn.net/?f=10C4%3D%5Cfrac%7B10%21%7D%7B4%21%2810-4%29%21%7D%3D210)
Answer:
Step-by-step explanation:
Draw a picture Of a triangle ABC , BC as Base connect D on AB , and E on AC together with a line parallel to Base BC
Λ if using one of the 5 postulate of Euclid:
"If 2 parallel line intersected by a third line, the interior angles are equal."
< B = < D , and < C = < E .
Triangle ABC is similar to ADE
AD/ Ab = AC / AB
I think it’s A because it’s says angeline did not make a mistake while the other point are describing or guessing the mistake she made
Answer:
the 4 kilograms of bananas for 7.48 would be better because 4 kilos. of bananas for 2.06 x4 would be 8.24
Answer:
He'll pay $110.25
Step-by-step explanation:
To find the area, we divide the shape into two parts at approximately the middle line. The top shape is a trapezoid of base length 7 feet and height 6 feet, while the bottom shape is a parallelogram with one side equal to 4 feet.
Area of trapezoid = (7 + 4)/2 x 6
Area of trapezoid = 33 sq ft
Area of parallelogram = 4 x 4
Area of parallelogram = 16 sq ft
Total area = 49 sq ft
Cost = 2.25 x 49
Cost = $110.25