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MissTica
2 years ago
15

3x+4y = 12 Can you help solve please?

Mathematics
1 answer:
Komok [63]2 years ago
6 0

Answer: y = -3/4x+3

Step-by-step explanation:

3x+4y=12

4y=-3x+12

y = -3/4x+3

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The cost of six hens and one duck at the university poultry farm is GH₵40. While four hens and three ducks cost GH₵36. What is t
Anon25 [30]

Answer:

Step-by-step explanation:

Let's call hens h and ducks d. The first algebraic equation says that 6 hens (6h) plus (+) 1 duck (1d) cost (=) 40.

The second algebraic equations says that 4 hens (4h) plus (+) 3 ducks (3d) cost (=) 36.

The system is

6h + 1d = 40

4h + 3d = 36

The best way to go about this is to solve it by substitution since we have a 1d in the first equation. We will solve that equation for d since that makes the most sense algebraically. Doing that,

1d = 40 - 6h.

Now that we know what d equals, we can sub it into the second equation where we see a d. In order,

4h + 3d = 36 becomes

4h + 3(40 - 6h) = 36 and then simplify. By substituting into the second equation we eliminated one of the variables. You can only have 1 unknown in a single equation, and now we do!

4h + 120 - 18h = 36 and

-14h = -84 so

h = 6.

That means that each hen costs $6. Since the cost of a duck is found in the bold print equation above, we will sub in a 6 for h to solve for d:

1d = 40 - 6(6) and

d = 40 - 36 so

d = 4.

That means that each duck costs $4.

3 0
3 years ago
1) What part of 20 is 5?<br> 2) What part of 20 is 12?
Ksivusya [100]

Answer:

  1. 1/4
  2. 3/5

Step-by-step explanation:

You find the part by expressing the ratio as a fraction, then simplifying.

1. 5/20 = (1·5)/(4·5) = (1/4)·(5/5) = 1/4

5 is 1/4 of 20.

__

2. 12/20 = (3·4)/(5·4) = (3/5)·(4/4) = 3/5

12 is 3/5 of 20.

8 0
3 years ago
Find the value of x and y
valina [46]

Answer:

X is 90 y is 43

Step-by-step explanation:

8 0
3 years ago
Elina and Gustavo leave Cayley H.S. at 3:00 p.m. Elina runs north at a constant speed
Andrej [43]

Answer:

the answer to your question is 'b'

8 0
2 years ago
If  the three angles  of  a quadrilateral are 120,  130, 10 then the fourth angle is​
Aloiza [94]

Answer:

100

Step-by-step explanation:

120 + 130 + 10 = 260

360 - 260 = 100

4 0
2 years ago
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