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laila [671]
3 years ago
13

Y-3x=2 y=-2x-8 how do i solve this by substitution

Mathematics
2 answers:
11111nata11111 [884]3 years ago
3 0
\left \{ {{y-3x=2} \atop {y=-2x-8}} \right. \\\\Substitute\ second\ equation
 to\ first:\\\\-2x-8-3x=2\\-2x-3x=2+8\\-5x=10\ \ \ \ \ \ |:-5\\x=-2\\\\y=-2\cdot(-2)-8\\y=4-8\\y=-4\\\\ \left \{ {{y=-4} \atop {x=-2}} \right.
kupik [55]3 years ago
3 0
Y-3x=2
y=-2x-8
-2x-8-3x=2
-5x-8=2 add 8 from both side
-5x=10 divided -5 both side
x=-2
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What is the equation of the line which includes points (-3, 2) and (1, 6)?
olchik [2.2K]

Answer:

required equation of line is y=x+5

Step-by-step explanation:

equation of line passing through points(x_1,y_1) and{ x_2,y_2)

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

put the co-ordinate (-3,2) and(1,6)

y-2=\frac{6-2}{1+3}\times{x+3}

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y=x+5 answer

3 0
3 years ago
Order these numbers from least to greatest. 7.7 , −71517 , 49 , 18724
Veseljchak [2.6K]
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4 0
3 years ago
Mmmm....Math confusing
sattari [20]

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162 unit²

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Refer to attachment.

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8 0
2 years ago
Hurry quick! If you know how to solve this please let me know step by step because I don't understand the material. Questions ar
Eva8 [605]

Answer:

x+y=29

70x+80y=2130

x=19 and y=10

Step-by-step explanation:

the amount of tickets he sold is 29 which includes VIP and general admission tickets so the number of tickets sold for each would be x+y=29.

the price for general admission is 70$ and VIP is 80$. the profit from the tickets is 2130$ so that would be the number of general tickets (x) times the price (70) and the number of VIP tickets (y) times the price (80) so that would be 80y. therefore you're equation would be 70x+80y=2130. that is your system of equations.

To figure out the number of tickets for each: Solve x+y=29 for x:

x+y=29

x+y+−y=29+−y(Add -y to both sides)

x=−y+29

Substitute−y+29 for xi n70x+80y=2130:

70x+80y=2130

70(−y+29)+80y=2130

10y+2030=2130 (Simplify both sides of the equation)

10y+2030+−2030=2130+−2030 (Add -2030 to both sides)

10y=100

10y/10=100/10 (Divide both sides by 10)

y=10

Substitute 10 for y in x=−y+29:

x=−y+29

x=−10+29

x=19 (Simplify both sides of the equation)

Answer: x=19 and y=10

8 0
3 years ago
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What is the approximate area of circle 10.4 cimeters?
lesantik [10]
I think the answer is 10.0 

6 0
3 years ago
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