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Alex777 [14]
3 years ago
12

10 POINTS AND BRAINLIEST

Mathematics
2 answers:
anygoal [31]3 years ago
6 0
- For situation one it would no
\frac{28}{4}  = 7
✔ Situation 2 would be yes
\frac{14}{4 }  =  \frac{7}{2}
- Situation 3 would be no
\frac{7.50}{10}  = 0.75 =  \frac{ 3}{4}
- Situation 4 would be no
\frac{1.50}{2}  = 0.75 =  \frac{3}{4}
DedPeter [7]3 years ago
4 0

Answer:

Sara runs an average of fourteen miles every four days.

A recipe calls for 3 1/2 cups of flour for every 1 cup of sugar.

Step-by-step explanation:

<em>Determine which of the following situations can be modeled by the ratio 7/2.</em>

  • <em>For every twenty-eight cats, there are 4 four dogs.</em> NO. The ratio of cats to dogs is 28/4 = 14/2.
  • <em>Sara runs an average of fourteen miles every four days.</em>  YES. The ratio of miles to days is 14/4 = 7/2.
  • <em>An online clothing store charges $7.50 to ship ten clothing items.</em> NO. The ratio of price to items is 7.50/10 = 0.75/1 = 1.50/2.
  • <em>A recipe calls for 3 1/2 cups of flour for every 1 cup of sugar.</em>  YES. The ratio of cups of flour to cups of sugar is 3.5/1 = 7/2.
  • <em>Bottled water is on sale this week for a rate of $1.50 for two bottles.</em> NO. The ratio of price to bottles is 1.50/2.
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Consider a series system composed of 4 separate components where each component has a 30% chance of failing. Assume each compone
Marina86 [1]

Answer:

16.15% probability that exactly 3 of them would function

Step-by-step explanation:

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

Probability of each system working:

4 components, which means that n = 4

Each has a 30% probability of failing, so p = 1 - 0.3 = 0.7

For the system to work, all 4 components have to work. This is P(X = 4).

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 4) = C_{4,4}.(0.7)^{4}.(0.3)^{0} = 0.2401

0.2401 probability of a system working.

If you have 7 of these systems, what is the probability that exactly 3 of them would function?

Now 7 systems, so n = 7

0.2401 probability of a system working.

We have to find P(X = 3).

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 3) = C_{7,3}.(0.2401)^{3}.(0.7599)^{4} = 0.1615

16.15% probability that exactly 3 of them would function

5 0
3 years ago
Can anybody please help me
faltersainse [42]

Answer:

324

Step-by-step explanation:

The shirt would be the same value because they are the same so

288÷3=96

Pi Shirt = 96

then work out the 3rd one to find out the balloons

98+ balloon + balloon= 226-96=130÷2= 65

Balloons = 65

then work out the 2nd one 195÷65=3

Pizza = 3

Then 4th one

25+1=26-3=29

Maccoroni = 29

Last question

96×3+65-29=324

4 0
3 years ago
What is 8.478 in expanded form?
nataly862011 [7]
<span>8+0.4+0.07+0.008 you basically separate the numbers starting with the largest working down to the smallest.

i hope i helped

</span>
7 0
3 years ago
Read 2 more answers
|5x|-2=18 helps love this problem please help
drek231 [11]

Answer:

x = 4

Step-by-step explanation:

The absolute value of 5x is still 5x.

5x - 2 = 18

Add 2 to both sides

5x = 20

Divide both sides by 5

x = 4

7 0
4 years ago
Read 2 more answers
Fator by grouping ab+2a+5b+10
Alenkasestr [34]
Ab + 2a + 5b + 10

= a(b + 2) + 5(b + 2)

= (b + 2) (a + 5)
3 0
3 years ago
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