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nalin [4]
3 years ago
13

Abriana claims that the solution to the system of linear equations y = 2x – 1 and –12x + 3y = 9 is (–2, –5). Select all methods

that could be used to prove Paige's claim.
Mathematics
1 answer:
EleoNora [17]3 years ago
7 0

Answer:

Substitution method can be used

Step-by-step explanation:

Given the system of equations

y = 2x-1 ....1

-12x + 3y = 9 ....2

The best method to use id the substitution method

Substitute equation 1 into 2;

From 2;

-12x + 3y = 9

-4x + y = 3

-4x + 2x-1 = 3

-2x -1 = 3

-2x = 3+1

-2X = 4

x = -4/2

x = -2

Substitute x = -2 into 1

y = 2x - 1

y = 2(-2)-1

y = -4-1

y = -5

Hence the solution to the system of equation is (-2, -5)

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Select all the points that are on the line through LaTeX: (0,5)( 0 , 5 ) and LaTeX: (2,8)( 2 , 8 ). Group of answer choices LaTe
Ivenika [448]

Answer:

The points (4,11), (6,14), (30,50) lie on the line joining the points (0,5) and (2,8).

Step-by-step explanation:

The equation of the line passing through two points (x_1,y_1) and (x_2,y_2) is

y-y_1=\frac{y_2-y_1}{x_2-x_1}(x-x_1)

So, the equation of the line passing through two points (0,5) and ( 2, 8 ) is

y-5=\frac{8-5}{2-0}(x-0)

\Rightarrow y=1.5x+5\cdots(i)

For the point (4,11), pout x=4 in equation (i), we have

y=1.5\times4 +5=11, which is given y coordinate, hence this point (4,11) lies on the line.

For the point (5,10), pout x=5 in equation (i), we have

y=1.5\times5 +5=12.5, which is not the given y coordinate, hence the point (5,10) doesn't lie on the line.

For the point (6,14), pout x=6 in equation (i), we have

y=1.5\times6 +5=14, which is the given y coordinate, hence the point (6,14)  lies on the line.

For the point (30,50), pout x=30 in equation (i), we have

y=1.5\times30 +5=50, which is the given y coordinate, hence the point (30,50) lies on the line.

For the point (40,60), pout x=40 in equation (i), we have

y=1.5\times40 +5=65, which is not the given y coordinate, hence the point (40,60) doesn't lie on the line.

Hence, the points (4,11), (6,14), (30,50) lie on the line joining the points (0,5) and (2,8).

4 0
3 years ago
Lindsay fills up the gas tank before beginning a long trip. When the gas gauge shows that she has used three-eights of a tank of
Ksju [112]

Answer:

440miles

Step-by-step explanation:

We are told that mileage of 165 = 3/8 of a tank of gas

as inverse 5/8 would be left and the product we seek to add to 165.

We find a ratio to distribute 165 as 3/8

First we double and find 6/8 is an even number and = 330 miles.

= 3/4 ratio and that is 6:8 so 2 extra we seek to make a full tank before we add is 1/3 of 330 miles as 1/3 = 2/8 to make this balance only in this question is this possible as we call it distribution like percentage 10% added to 100 would always be 10 just like it is added, but finding 10% of 110 is different.

Therefore so would 1/3 afterwards once we find 1/3 = 2/8 is not the same as finding 1/3 after we find the full tank.

1/3 of 330 = 110

110 +330 = 440miles

I hope that helps you see how to work out close range distribution.

As now not that it's asking you to see 1/3 of 440miles but in same principal as explained about the 10% theory, you see 1/3 of 440 miles is now more than 110. it is 1/3 x 440 = 146.66 = 1/3. and so we can prove distribution is possible and say 2/8 = 1/3 even though in relation to 1 as a whole number its not true. It's only true in distribution.

4 0
3 years ago
I need help what is the answer to this question
spayn [35]

Answer: D

Step-by-step explanation:

5 0
3 years ago
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The state park has a perimeter of 38 miles. What is the area of the park . The width of park is 7 miles
weqwewe [10]

Answer:

84 miles

Step-by-step explanation:

7+7=14

38-14=24

24/2=12

12 length

7 width

7x12=84

3 0
3 years ago
Help me & show work please Thankyou !!!
IRISSAK [1]

Answer:

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Step-by-step explanation:

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