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Artemon [7]
3 years ago
13

Solve the system by substitution. 3x +2y=-21 x+y=-9

Mathematics
1 answer:
galben [10]3 years ago
5 0

Answer:

Step-by-step explanation:

3x +2y=-21  and x+y=-9

3x +2y=-21  and x = -9-y

=> 3(-9 - y) + 2y = -21

-27 -3y + 2y = -21

-y = 6

y= -6

=> x = -9+6= -3

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The points J, K, L and M all lie on the same line segment, in that order, such that the ratio of JK:KL:LMJK:KL:LM is equal to 1:
RideAnS [48]

Answer: JL = 25

Step-by-step explanation: Segment JM is the total measure of the line segment and it equals 45.

Suppose first segment JK measures d.

The total ratio is the sum of each part

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The sum of each part corresponds to the total measure of the line segment. Then:

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d = 5

Segment JL is

JL = d + 4d

JL = 5d

JL = 5.5

JL = 25

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3 years ago
A computer store buys a computer system at a cost of ​$370.80. The selling price was first at $ 618​, but then the store adverti
Anestetic [448]
The current sale price would be $123.60.

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4 0
3 years ago
PLEASE HELP NTH TERM MATHS
fredd [130]

Answer:

odd numbers

Step-by-step explanation:

4 - 7 is 3, 7 - 12 is 5, 12 - 19 is 7, 19 to 28 is 9

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4 0
2 years ago
Read 2 more answers
How does the structure of a trinomial with a leading coefficient of 1 and a positive constant help to factor it?
mixer [17]

Answer:

See explanation

Step-by-step explanation:

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You just have to look for two factors of the constant term that add up to the coefficient of x( the middle term).

Then you write as factors.

For instance;

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3 years ago
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X = 6

3 0
2 years ago
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