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irina [24]
3 years ago
5

A garden contains 20 different species of plants. Five of these plants are ferns. What percent of the garden is made up if ferns

?
Mathematics
2 answers:
algol133 years ago
6 0

Answer:

25%

Step-by-step explanation:

A garden contains 20 different species of plants. Five of these plants are ferns.

Total number of species = 20

In that 20 species , 5 are ferns

WE need to find out how much percentage of 20 is 5

LEts make an equation. x be the percentage

x% of 20 is 5

\frac{x}{100} \cdot 20 = 5

\frac{x}{5}= 5

Now multiply both sides by 5

x= 25

So 25% of 20 species plans is equal to 5 ferns

777dan777 [17]3 years ago
4 0
5 out of 20 plants can be written as 5/20.  

A percentage is just a fraction with the denominator being 100.  
100 / 20 = 5. 
5 X 5 = 25
25/100

25% of the garden is made up of ferns

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55 is what percent of 100
max2010maxim [7]

55 is 55% of 100.

percents are based of of 100, so 55 would be 55/100 or 55%.

5 0
4 years ago
What is -6 divided by 3/7x
Sphinxa [80]

Step-by-step explanation:

- 6  \div   \frac{3}{7x}  \\  \\  =  - 6 \times  \frac{7x}{3}  \\  \\  =  - 2 \times 7x \\  \\  =  - 14x

8 0
3 years ago
A family buys airline tickets online. The family buys travel insurance that costs ​$ per ticket. The total cost is ​$. Let x rep
Nookie1986 [14]

Answer:

One ticket equals $169

Step-by-step explanation:

The family buys 4 airline tickets online.

The travel insurance costs $19 per ticket.

The total cost is $752.

A.

An equation that models this problem could be

Basically, we know that the insurance costs $19 which represents an additional costs after the price per ticket, that's why we need to add them. Then, we know that the familiy bought 4 tickes, that's why we multiply by 4, and finally, the total cost must be equal to 752, according to the problem.

B.

To find the price of one ticket, we just need to solve the equation for

Therefore, one ticket costs $169.

5 0
3 years ago
In how many ways can 6 competitors finish a race assuming there are no ties?In how many ways can we sit n people on r < n cha
VLD [36.1K]

Answer:  a) 720, b) ^nC_r=\dfrac{n!}{(n-r)!r!} c) 336, d) 30240 e) 120.

Step-by-step explanation:

Since we have given that

a) Number of competitors  = 6

We need to find the number of ways that 6 competitors can finish a race and there are no ties.

So, Number of ways would be

6!=720

b) number of people = n

Number of chairs = r (r<n)

so, the number of ways we can sit n people on r<n chairs is given by

^nC_r=\dfrac{n!}{(n-r)!r!}

c) If there are three awards :

Gold, silver, bronze.

We need to find the number of ways that these medals can be awarded.

Number of ways is given by

^8P_3\\\\=336

d) Number of 5-digit zip codes are possible is given by

^{10}P_5=30240

e) Number of poeple = 10

Number of people required in committee = 3

Number of different 3 person committee that are selected from 10 people is given by

^{10}C_3=120

Hence, a) 720, b) ^nC_r=\dfrac{n!}{(n-r)!r!} c) 336, d) 30240 e) 120.

6 0
4 years ago
Consider the following scenario describing Mr. Smith's math students: A list pairs math grades with student heights.
KonstantinChe [14]

Answer:

No, Because students who have the same math grade can be different heights

Step-by-step explanation:

C is the answer DO NOT PICK D

You have the put the correct input and output IN ORDER so D is the wrong answer

8 0
3 years ago
Read 2 more answers
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