Which of the following points best represents the principal square root of 8 on the number line?

Mathematics

1 answer:

loris [4]3 years ago

7 0

Answer:

Step-by-step explanation:

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2. H = 5 cm W= 4 cm L= 8 cm V= L×W×H =___×___×___ =______cm3

hram777 [196]

Answer:

160cm^3

Step-by-step explanation:

5 x 4 x 8 = 160cm^3

6 0

3 years ago

Read 2 more answers

Plsss help me with this question!!!

Molodets [167]

There are 27 men in the train car.
69-15=54
54 divided by 2 = 27

5 0

2 years ago

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:

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