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algol [13]
3 years ago
13

Please help ASAP

Mathematics
1 answer:
Molodets [167]3 years ago
7 0

Step-by-step explanation:

it maybe

8m= 36+20

m=56/8

=7 answer

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What’s 4(x+5)=60?<br> I neeeddd helllppppp
Step2247 [10]
X = 10

hope this helped :))
5 0
3 years ago
Pls help me how do I write 20,484,163 in expanded form I'm only in 2nd grade
mestny [16]

Answer:

twenty thousand four hundred and eight four one hundred and sixty four

7 0
3 years ago
Read 2 more answers
A student who is trying to write a paper for a course has a choice of two topics, A and B. If topic A is chosen, the student wil
algol13

Answer:

P(Topic A) = 0.91

P(Topic B) = 0.9163

The student should choose Topic B to maximize the probability of writing a good paper because P(Topic B)>P(Topic A).

Step-by-step explanation:

If Topic A is chosen, 2 books will be ordered (n=2)

If topic B is chosen, 4 books will be ordered (n=4)

Probability that a book arrives in time (p) = 0.7

Probability that a book does not arrive in time (q) = 1 - p = 1 - 0.7 = 0.3

We will <u>use the binomial distribution</u> to find out which topic should the student choose to maximize the probability of writing a good paper. The binomial distribution formula is:

P(X=x) = ⁿCˣ pˣ qⁿ⁻ˣ

where p = probability of success

           q = probability of failure

           n = total no. of trials

           x = no. of successful trials

For Topic A, n = 2, p=0.7 and q=0.3. If topic A is chosen, the student will use at least half the books i.e. he will use either 1 or 2 books. So,

P(Topic A) = P(X=1) + P(X=2)

                 =²C₁ (0.7)¹(0.3)²⁻¹ + ²C₂ (0.7)²(0.3)²⁻²

                 = 0.42 + 0.49

P(Topic A) = 0.91

For topic B, n=4, p=0.7 and q=0.3. If topic B is chosen, the student will choose 2 or more books i.e. 2, 3 or 4 books.

P(Topic B) = P(X=2) + P(X=3) + P(X=4)

                  = ⁴C₂ (0.7)²(0.3)⁴⁻² + ⁴C₃ (0.7)³(0.3)⁴⁻³ + ⁴C₄ (0.7)⁴(0.3)⁴⁻⁴

                  = 0.2646 + 0.4116 + 0.2401

P(Topic B) = 0.9163

The student should choose Topic B to maximize the probability of writing a good paper because P(Topic B)>P(Topic A) as calculated above.

3 0
3 years ago
Two trains leave stations 442 miles apart at the same time and travel toward each other. One train travels at 95 miles per hour
Brrunno [24]

(75 + 95) \times x = 442

x =  \frac{442}{75 + 95}  = 2.6

so it takes 2.6 of hours which is the same as 2 hours and 36 minutes for them to reach eachother.

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3 years ago
John needs to hire a painter. Painter A is offering his services for an initial fee of $150 in addition to $12 per hour. Painter
mel-nik [20]

Answer:

Step-by-step explanation:

5 0
3 years ago
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