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never [62]
3 years ago
11

There are 46 legs in a zoo exhibit every animal has either two or four legs the number of two legged animals is 2 more than the

4 legged animals how many animals are there
Mathematics
1 answer:
aalyn [17]3 years ago
8 0

Answer:the number of 2 legged animals in the zoo is 9

the number of 4 legged animals in the zoo is 7

Step-by-step explanation:

Let x represent the number of 2 legged animals in the zoo.

Let y represent the number of 4 legged animals in the zoo.

There a 46 legs in the exhibit in the zoo. This means that

2x + 4y = 46 - - - - - - - - - -1

There are 2 more 2 legged animals than 4 legged animals. This means that

x - 2 = y

Substituting y = x - 2 into equation 1, it becomes

2x + 4(x - 2) = 46

2x + 4x - 8 = 46

6x = 54

x = 54/6 = 9

Substituting x = 9 into x - 2 = y, it becomes

y = 9 - 2 = 7

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At a movie theater, tickets for children cost $8 each and adult tickets cost $8.75 each. Of ticket sales for a group of 35 peopl
alexandr402 [8]

Answer:

The results don't make sense

Step-by-step explanation:

We can solve by means of a 2x2 system of equations, we have to:

"x" is the number of children's tickets

"y" is the number of adult tickets

Thus:

8 * x + 8.75 * y = 259

 x + y = 35 => x = 35 - y

replacing we have:

 8 * (35 - y) + 8.75 * y = 259

280 - 8 * y + 8.75 * y = 259

 - 8 * y + 8.75 * y = 259 - 280

0.75 * y = -21

y = -21 / 0.75

y = -28

Thus:

x = 35 - (-28) = 63

With these results we notice that the problem has inconsistency, since the value of the tickets cannot be given a negative number, I recommend reviewing the problem, since the approach is correct.

3 0
3 years ago
A biology student wants to determine if using a fertilizer would help promote the growth of new babies in spider plants. The stu
sveticcg [70]

Answer:

Randomized block design

Step-by-step explanation:

From the question, we can see the following:

- There are 30 plants of each variety. This means that they are divided into variety subgroups which we will call blocks.

- Now, we are told each plant in each block all are potted in the same amount and type of soil, given the same amount of water, and exposed to the same amount of light. This means that each plant in each block is assigned a treatment condition.

- The procedure is repeated by subjecting each plant one after the other in teach Block to different treatments and this will reduce variability.

Looking at all the statements above, it is clear that this is a randomized block design because a randomized block design is when the experimenter/researcher divides members/participants into subgroups called blocks in a manner that the variability within the blocks is less than the variability between the blocks. Thereafter, the participants within each block will now be randomly assigned to treatment conditions.

7 0
3 years ago
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Answer:

is D i had this on my math test

Step-by-step explanation:

6 0
3 years ago
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How does f(x) = 3* change over the interval x = 4 to x = 57
Vilka [71]

f(x) increase by a factor of 3

Explanation:

        Given that f(x)= 3* and the interval is x=4 to x=57

        Now we put the value for x is 4 to 57 then value of f(x) increase with the multiply of 3.

        Because the x is multiplied with 3 i.e., 3*

        So f(x) increase by a factor of 3.

        If we put x=4, then f(x)= 12     (∵ 3×4=12)

        If we put x=5, the f(x)= 15       (∵ 3×5=15)

        If we put x=6,the f(x)= 18             (∵ 3×6=18)

similarly., values of x= 7,8,9,...155.

        Then,

        If we put x=56, the f(x)=168

        This process will continue until f(x)=171 for x=57.

6 0
3 years ago
A pound is approximately 0.45 kilogram. A person weighs 86 kilograms. what is the person's weight, in pounds, when rounded to th
Nutka1998 [239]

Answer:

C. 193 lb

Step-by-step explanation:

To find their weight in pounds, divide their weight in kilograms by 0.45:

86/0.45

= 191.11

This is closest to answer choice C, so C is the correct answer.

4 0
3 years ago
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