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sp2606 [1]
3 years ago
5

PLS HELP!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics
1 answer:
Lina20 [59]3 years ago
3 0

Answer:

43580627.4

Step-by-step explanation:

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The following problem refers to strings in A, B, ..., Z.
pshichka [43]

Answer:  676

Step-by-step explanation:

The total number of letters in English alphabet {From A to Z} = 26

We assume that the repetition of letters is allowed.

If we fix H at the first position , then the number of ways to make three-letter strings that begin with H is given by :-

1\times26\times26=676

Hence, the number of ways to make three-letter strings that begin with H is 676.

8 0
4 years ago
Devon has 14 steel balls of equal weight. If he puts 8 of them in one pan of a balance, and the rest along with a weight of 20 g
astra-53 [7]
Let n be a number of balls: n = 14

In one pan you have 8 balls: 8n
In the other pan you have the rest of balls (14 - 8 = 6) along with a <span>weight of 20 grams = 6n + 20
So the pans are balanced:
8n = 6n + 20

Now, just solve the equation:
8n - 6n = 20
2n = 20
n = 20/2
n = 10
So, you know that a ball weights 10 grams.</span>
4 0
3 years ago
Read 2 more answers
Item has been reduced by 80% what is the price of the item now?
Eva8 [605]

I think you use

xamount(1-.8)

.8 being 80% as a decimal.

1 being 100%

so .2 or 20% remaining multiplied by whatever amount.

6 0
4 years ago
Find the probability of each event. A class has five boys and nine girls. If the teacher randomly picks six students, what is th
kumpel [21]

Answer: \dfrac{60}{143}

Step-by-step explanation:

Given,  A class has five boys and nine girls.

Total students = 5+9=14

Number of ways to choose 6 students out of 14= ^{14}C_6  [Using combinations]

Number of ways to choose 4 girls out of 6 (4 girls + 2 boys = 6 ) = ^{9}C_4\times\ ^{5}C_2

If the teacher randomly picks six students, then the probability that he will pick exactly four girls:-

\dfrac{^{9}C_4\times \ ^{5}C_2}{^{14}C_6}

=\dfrac{\dfrac{9!}{4!5!}\times\dfrac{5!}{2!3!}}{\dfrac{14!}{6!8!}}\\\\=\dfrac{1260}{3003}\\\\=\dfrac{60}{143}

hence, the required probability = \dfrac{60}{143} .

4 0
3 years ago
46 is 92 percent of what number
Vladimir79 [104]
1. We assume, that the number 92 is 100% - because it's the output value of the task. 
<span>2. We assume, that x is the value we are looking for. </span>
<span>3. If 100% equals 92, so we can write it down as 100%=92. </span>
<span>4. We know, that x% equals 46 of the output value, so we can write it down as x%=46. </span>
5. Now we have two simple equations:
1) 100%=92
2) x%=46
where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:
100%/x%=92/46
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 46 is what percent of 92

100%/x%=92/46
<span>(100/x)*x=(92/46)*x       - </span>we multiply both sides of the equation by x
<span>100=2*x       - </span>we divide both sides of the equation by (2) to get x
<span>100/2=x </span>
<span>50=x </span>
x=50

<span>now we have: </span>
<span>46 is 50% of 92

I hope this helps!




</span>
5 0
3 years ago
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