there are 13 animals in a barn. some are ducks and some are pigs. there are 40 legs in all. how many of each animal are there?

Answers

Answer 1
Answer: Let X be chickens
Let Y be pigs,
then x+y=13
the animals have 2x+4y legs,
 so 2x+4y=40
The system of the equations
[X+y=13
[2x+4y=40
Divide the second equation by 2
[x+y=13
[x+2y=20
subtract the first equation from the second one
y=20-13
y-7 pigs
substitute y=7 into the first equation
x+7=13
x=13-7
x=6 chickens

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on average , a dolphin swims at a speed of 8 kilometers per hour for about 15 hours per day. what distance does a dolphin travel per day?

Answers

8 kilometers*15 hours= 120 kilometers per day. Hope I helped! :-)

Given: f(x) = x 2, g(x) = x + 6, h(x) = 7Find h{g[f(x)] }.

a. 7
b. 20
c. 55

Answers

The value of h{g[f(x)]} is 7 after finding the composite function option (a) 7 is correct.

What is a function?

It is defined as a special type of relationship, and they have a predefined domain and range according to the function every value in the domain is related to exactly one value in the range.

It is given that:

f(x) = x²

g(x) = x + 6

h(x) = 7

g[f(x)] = x² + 6

h{g[f(x)]} = 7

Thus, the value of h{g[f(x)]} is 7 after finding the composite function option (a) 7 is correct.

Learn more about the function here:

brainly.com/question/5245372

#SPJ2

Answer:

a. 7

Step-by-step explanation:

f(x) = x²

g(x) = x + 6

h(x) = 7

g[f(x)] = x² + 6

h{g[f(x)]} = 7

a chalk line is placed around the perimeter of the football field what is the length of this line in feet

Answers

50 so thatbis the snswer



1+4=5, 2+5=12, 3+6=21 , 8+11=?

Answers

If there is a pattern here to follow then the person before is wrong. If there is no pattern then you are wrong with all of the answers there 

8+11=40 This is because in this pattern you take the equations before answer and add it to the equation you have so for the first equation you have 5 for the second equation you actually add 2+5+5=12 so the last one equals 8+11+21=40

Hope This helps!

what is 1/10 divided by 9/10?

Answers

1/10 divided by 9/10
1/10 x 10/9
10/90 simplified to 1/9

Answer:

1/10 divided by 9/10 is 1/9

Step-by-step explanation:

It is 1/9 because 1/10 divided by 9/10 is the same as using the reciprocal of 9/10 which then now you have 1/10 multiply by 10/9 and you have 10/90 which is simplified to 1/9.

Hope this helps. :)

A triangle has the following side lengths: 8 centimeters, 13 centimeters, 15 centimeters. Which of the following statements best describes its construction? It is impossible to construct a triangle with these side lengths. There is one possible triangle with these side lengths. There are many possible triangles with these side lengths. There are many possible similar triangles with these side lengths.

Answers

Answer:

The statements that best describes its construction is:

         There is one possible triangle with these side lengths.

Step-by-step explanation:

We know that with the help of three given angle measures infinite number of triangles could be constructed with different side lengths and with the help of three gives side lengths a unique triangle is constructed.

Here we are given three side lengths as:

  8 centimeters, 13 centimeters, 15 centimeters.

  This means that there is only one such triangle possible.

I am not completely sure but I would think it would be the second statement. Hopes this helps.