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kirill115 [55]
3 years ago
7

Which system of equations is graphed below? On a coordinate plane, a line goes through (0, 1) and (4, negative 2) and another go

es through (0, negative 6) and (6, 0). x minus y = 6. 4 x + 3 y = 1. x minus y = 6. 3 x + 4 y = 4. x + y = 6. 4 x minus 3 y = 3. x + y = 6. 3 x minus 4 y = 4.
Mathematics
2 answers:
sladkih [1.3K]3 years ago
3 0

Answer:

14.5, 13, 11.5

Step-by-step explanation:

the general term (an) of an arithmetic sequence with first term a1 and common difference d is

 an = a1 + d(n-1)

then the 8th term is

 a8 = a1 + d(8-1)

and the 12th term is

 a12 = a1 + d(12-1)

so, the difference between these terms is

 a12 -a8 = (a1 +11d) -(a1 +7d) = 4d

 = (-2-4) = -6 . . . substituting values for a12 and a8

then the common difference is

d = -6/4 = -3/2

using this, we can find a1 from a8.

 4 = a1 +7·(-3/2) = a1 - 10.5

 14.5 = a1 . . . . add 10.5 to both sides of the equation

this is the first term. the second is this value with the common difference added:

 14.5 + (-1.5) = 13

the third term is this with the common difference added:

 13 + (-1.5) = 11.5

in summary, the first three terms are

 14.5, 13, 11.5

GrogVix [38]3 years ago
3 0

Answer:

a)x - y = 6. 4 x + 3 y = 1.

Step-by-step explanation:

i took the quiz

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Step-by-step explanation:

there are 2 similar triangles : ABE and DCE

that means they have the same angles, and the scaling factor from one triangle to the other is the same for every side.

and that means that

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we know that

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a.

so, we have actually

DE/(AD+DE) = EC/(BC+EC)

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2 years ago
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Since y = 2x+3 from the first equation, we can replace every copy of y with (2x+3). This replacement is valid because y and 2x+3 are the same.

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Step-by-step explanation:

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