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elena55 [62]
3 years ago
9

3x +y = -2x+8

Mathematics
1 answer:
soldier1979 [14.2K]3 years ago
5 0

Answer: c) -4

Step-by-step explanation:

Get the variables on one side of 3x+y=-2x+8 and the constants on another side:

3x+y=-2x+8

(3x+y)+2x=(-2x+8)+2x

5x+y=8

Now, multiply 5x+y=8 by -2:

-2(5x+y=8)

-10x-2y=-16

Add this equation to -3x+2y=-10:

(-10x-2y=-16)+(-3x+2y=-10)

-13x=-26

x=2

Plug x=2 into -3x+2y=-10:

-3(2)+2y=-10

-6+2y=-10

2y=-4

y=-2

Therefore, (2, -2) is the solution to the system of equations, so xy=(2)(-2)=-4

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In a study of births from New York State, data were collected from 4 hospitals and coded as follows: (1) Albany Medical Center (
Andre45 [30]

Answer:

Nominal

Step-by-step explanation:

The numbers 1, 1438, 66, and 413 assigned to hospitals are used for identification only and hold no quantitative value. That is, that numbers don't actually mean anything, they are just used to differentiate between the many New York State hospitals. This type of measurement aimed at identification is defined as a nominal level of measurement.

7 0
4 years ago
Find the other end point of the line segment that has the given points: Endpoint: (5,1) Midpoint: (9,3)
Tems11 [23]
The formula for the midpoint of a line segment:
(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})
where x₁, y₁ - the coordinates of one endpoint; x₂, y₂ - the coordinates of the other endpoint

\hbox{endpoint} - (5,1) \\
x_1=5 \\ y_1=1 \\ \\ \hbox{midpoint} - (9,3) \\ \Downarrow \\ \frac{5+x_2}{2}=9 \\ 5+x_2=18 \\ x_2=13 \\ \\ \frac{1+y_2}{2}=3 \\ 1+y_2=6 \\ y_2=5 \\ \\
\hbox{the other endpoint} - \boxed{(13,5)}
8 0
3 years ago
Solve the system by substitution: 3x - y = 21 and y = 6x
Naddik [55]

Answer:

if y=6x then 3x-6x=21

-3x=21

x=-7

4 0
3 years ago
NEED ANSWERS QUICKLY! CORRECT ANSWER GETS BRAINLIEST
Olenka [21]

Answer:

6 6

---- ÷ ---

16 10

Step-by-step explanation:

equals 5/8

3 0
3 years ago
How do I find the missing value
liberstina [14]
Okay. Since the "y" value and 82* are on the same straight line, their values will always add up to make a sum of 180. So if you subtract 82 from 180 you get 98*. So your "y" value is equal to 98*.

Now, all of the degree values added together should give you a sum of 360, so now we must add the values we know, in order to find the "x" value. So, 112*+82*+98*=292. Now we know that the difference of 360 and 292 will give us the x value. So finally, 360-292=68. So your "x" value is equal to 68.

y=98
x=68
6 0
4 years ago
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