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adelina 88 [10]
3 years ago
15

Please please help me on this i will be your friend and message you also

Mathematics
1 answer:
irga5000 [103]3 years ago
8 0
The answer is the 2nd choice.
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Solve the system of linear equations using multiplication.
Anna71 [15]

Answer:

(8,-1)

Step-by-step explanation:

The given system is:

3x+3y=21

6x+12y=36

Since I prefer to use smaller numbers I'm going to divide both sides of the first equation by 3 and both sides of the equation equation by 6.

This gives me the system:

x+y=7

x+2y=6

We could solve the first equation for x and replace the second x with that.

Let's do that.

x+y=7

Subtract y on both sides:

x=7-y

So we are replacing the second x in the second equation with (7-y) which gives us:

(7-y)+2y=6

7-y+2y=6

7+y=6

y=6-7

y=-1

Now recall the first equation we arranged so that x was the subject. I'm referring to x=7-y.

We can now find x given that y=-1 using the equation x=7-y.

Let's do that.

x=7-y with y=-1:

x=7-(-1)

x=7+1

x=8

So the solution is (8,-1).

We can check this point by plugging it into both equations.

If both equations render true for that point, then we have verify the solution.

Let's try it.

3x+3y=21 with (x,y)=(8,-1):

3(8)+3(-1)=21

24+(-3)=21

21=21 is a true equation so the "solution" looks promising still.

6x+12y=36 with (x,y)=(8,-1):

6(8)+12(-1)=36

48+(-12)=36

36=36 is also true so the solution has been verified since both equations render true for that point.

5 0
3 years ago
Read 2 more answers
Given the functions f(x) = – 3x – 5 and g(x) = x^2 – 4, find g(f(x)).
IceJOKER [234]
Answer is b . G)f(x))=9x^3+30x
5 0
3 years ago
There are two boxes containing only black and orange pens.
cestrela7 [59]

Answer:

Event 3 -> Event 1 -> Event 4 -> Event 2

Step-by-step explanation:

The probability of choosing a certain pen is the number of that pen in the box over the total number of pens in the box.

So we have that:

Event 1: We have 4 black pen and 20 total pens, so P = 4 / 20 = 1 / 5

Event 2: All pens are black or orange so the probability is 1.

Event 3: We don't have white pens, so the probability is 0.

Event 4: We have 2 black pen and 5 total pens, so P = 2 / 5

Listing from least likely to most likely, we have:

Event 3 -> Event 1 -> Event 4 -> Event 2

3 0
3 years ago
The square root of 125 is between what two numbers
Otrada [13]

The square root of 125 is in between 11 and 12. It is 11.1803.

6 0
3 years ago
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Why is it difficult to find fossilized plants and animals in the same place
alexandr1967 [171]

Answer:  because the conditions to generate a fossil for an animal is very different from the conditions required for a plant.

Step-by-step explanation:

it is D

3 0
3 years ago
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