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Nata [24]
3 years ago
14

Help pls. i’m taking a geometry quiz and don’t really understand

Mathematics
1 answer:
kramer3 years ago
5 0
Mw is 118 because a whole circle equals 360. you would do 360= 156+86+mw
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An instructor gives her class the choice to do 7 questions out of the 10 on an exam.
Maksim231197 [3]

Answer:

(a) 120 choices

(b) 110 choices

Step-by-step explanation:

The number of ways in which we can select k element from a group n elements is given by:

nCk=\frac{n!}{k!(n-k)!}

So, the number of ways in which a student can select the 7 questions from the 10 questions is calculated as:

10C7=\frac{10!}{7!(10-7)!}=120

Then each student have 120 possible choices.

On the other hand, if a student must answer at least 3 of the first 5 questions, we have the following cases:

1. A student select 3 questions from the first 5 questions and 4 questions from the last 5 questions. It means that the number of choices is given by:

(5C3)(5C4)=\frac{5!}{3!(5-3)!}*\frac{5!}{4!(5-4)!}=50

2. A student select 4 questions from the first 5 questions and 3 questions from the last 5 questions. It means that the number of choices is given by:

(5C4)(5C3)=\frac{5!}{4!(5-4)!}*\frac{5!}{3!(5-3)!}=50

3. A student select 5 questions from the first 5 questions and 2 questions from the last 5 questions. It means that the number of choices is given by:

(5C5)(5C2)=\frac{5!}{5!(5-5)!}*\frac{5!}{2!(5-2)!}=10

So, if a student must answer at least 3 of the first 5 questions, he/she have 110 choices. It is calculated as:

50 + 50 + 10 = 110

6 0
3 years ago
a store has 30 boxes of melon each box has 4 bags each bag holde 2 melons what is the total number of melon in the store?
Zarrin [17]
180 melons

4 x 2 x 30
8 0
3 years ago
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Hi please help !!! asap
Taya2010 [7]
Ayurveda is the traditional Hindu system of medicine, which is based on the idea of balance in bodily systems and uses diet, herbal treatment, and yogic breathing
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3 years ago
2 1/3 divided by y= -1.27272727<br> what does y equal
Semmy [17]

Answer:

-1.83337261989

Step-by-step explanation:

(2 1/3)/y=-1.272727

2 1/3 = -1.272727y

y=-1.83337261989

6 0
3 years ago
10 5 5 10 5 5 1. What is the perimeter of this figure, to the nearest unit ?! ​
olga55 [171]

Step-by-step explanation:

IIIIIIIIIIIIisjsbsbszzvsbshsgsvsbdhdhd dbdhhdbd 5 dbdhdbdbdbsgs s dbshsbd dbshsvssbs sjhdd. dhd

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