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IRISSAK [1]
3 years ago
15

The solution to the system equations

Mathematics
1 answer:
katovenus [111]3 years ago
3 0

Let's solve this system of equations through substitution.

We have these two equations.

-7x-2y=14

6x+6y=18

Now let divide the second equation by 6.

6x+6y=18 ---->   x+y=3

Next, let us move y to the right side of the equation.

x+y=3 -------> x=3-y (x equals 3-y)

Because we found out that what x is in terms of y, we can input that in for every instance of x in this equation below.

-7x-2y=14 becomes -7(3-y)-2y=14 (Why? Because x equals 3-y!)

We have a one variable equation now and can solve for y.

-7(3-y)-2y=14

-21+7y-2y=14

5y=35

y=7

Plug in 7 for y in any equation to find x.

x+y=3

x+7=3

x=-4

answer: x=-4, y=7

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X=40

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180-130=50°

Angle 7=50°

5 0
2 years ago
Trina brings 6 cubic yards of compost for planting the trees. Each tree needs to be planted with 1/6 cubic yards of compost
kumpel [21]
If the question is asking how many trees can be planted with 6 cubic yards of compost, here is the solution.

6 divided by 1/6 means to take 6 wholes and break them into groups the size of 1/6.

One whole can be broken into 6 groups of 1/6 (6/6), so 6 wholes can be broken into 36 groups of 1/6 (6 x 6 = 36/6).

Mathematically, you will multiply 6 by 6/1  to get the 36.

You can plant 36 trees with 6 cubic yards of compost.
8 0
3 years ago
HELPP PLEASE <br><br> let f(x)=2x^2+3x+1 and g(x)=x^2 +8. Find g(f(x)). Show each step
Vinvika [58]

Answer:

When applicable, state the domain restriction. g(f(x)) 4 x2 + 1 16 x2 + 3 4 x2 + 7 16 x2 - 8 x + 3 Please help. I thinks that it is 16 x2 + 3. College Algebra. Consider the function f(x)=4 - x^2 for the domain [ 0,∞). Find f^−1 (x), where f^−1 is the inverse of f

Step-by-step explanation:

6 0
2 years ago
1) B. Which method of finding the distance is<br><br> the best? Explain
sveticcg [70]

Answer and Step-by-step explanation:

Distance is the numerical measurement to find the space or interval between two objects. Distance also refers to physical length. Point x to point y  distance is denoted as |xy|

There are many ways to find out the distance, distance between two objects or two points. The efficient way of finding the distance between two points is given below. Mathematically, the distance between two points on a coordinate plane can be determined by using the distance formula, which is:

                                                 d =√((x2-x1)2+(y2-y1)2),

Where (x1, y1) and (x2, y2) coordinates, and d is the distance.

The middle point between these two points is known as midpoint and can find out by using the formula

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The distance between two points number line can also be calculated by using the formula:

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3 0
3 years ago
Lucy is estimating the income levels of households in a specific zip code. She randomly calls 100 households and collects
Lorico [155]

The average income for the household that is surveyed should represent the sample data is not relevant.

The information that should be considered as follows:

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  • The total income for the household that is surveyed represents the statistics of the sample.
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Therefore we can conclude that the average income for the household that is surveyed should represent the sample data is not relevant.

Learn more about the income here: brainly.com/question/14732695

7 0
2 years ago
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