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masha68 [24]
3 years ago
11

Using the graph, estimate the cost of 100 kilowatts-hours of electricity

Mathematics
1 answer:
Dimas [21]3 years ago
5 0

Answer: A - About $8

Step-by-step explanation:

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In the barn, there are horses and chickens. There are 11 heads and 32 legs altogether. How many chickens are there?
Masteriza [31]

Answer:

6 Chickens

Step-by-step explanation:

Let  H represent the number of horses and  C represent the number of chickens. Since there are 32 legs altogether this means that on equation to use would be given by:

2C  +  4 H  =  32     (Eq. 1)

Another equation can be made from the fact that there are 11 heads or 11 animals altogether which can be written as:

C  +  H  =  11    (Eq. 2)

From Eq. 2, solve for the number of chickens:

C  +  H  =  11

C   =  11  - H    (Eq. 3)

Substituting Eq. 3 in Eq. 1, the number of horses can be determined:

2 C  +  4 H  =  32

2 ( 11  −  H )  +  4 H  =  32

22   −  2 H  +  4 H  =  32

2H  =  32  − 22

2 H  = 10

H = 5               Eq.4

Putting Eq.4 in Eq.1

2C + 4*5 =  32

2C = 32 - 20

2C = 12

C = 12/2

C = 6

8 0
3 years ago
3 groups of how many tenths is 1.5
topjm [15]
Well its 1 and 5 tenths 
- 1.5 = 15 tenths
- 5 groups of 3 is the answer
because 5 x 3 = 15
5 0
3 years ago
Read 2 more answers
What is 2x 2 5/6 I need help due in 6 min
sleet_krkn [62]

Answer:

5 2/3

Step-by-step explanation:

2 * 2 5/6

2 * (12+5/6)

2 * (17/6)

34/6

17/3 = 5 2/3

4 0
3 years ago
Find a vector equation for the line through the point P = (-3,3, -5) and parallel to the vector V= (-2,-4, -4). Assume 1-(0) =-3
CaHeK987 [17]

Answer:

The vector equation of the line is

l(t)= "-3,3,-5" + t "-2,-4,-4", where t is a parameter.

4 0
3 years ago
Write the fraction below as a sum or difference 5x+7 over 4
defon
The answer is: 1.25x + 1.75
8 0
3 years ago
Read 2 more answers
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