How do I solve for x in the two equations below using substitution.
4x-2y=4
8x+2y=20

Answers

Answer 1

Answer: $4x-2y=4 \n8x+2y=20 \n \n\hbox{from the 1st equation:} \n4x-2y=4 \n-2y=-4x+4 \ny=2x-2 \n \n\hbox{substitute 2x-2 for y in the 2nd equation:} \n8x+2(2x-2)=20 \n8x+4x-4=20 \n12x=24 \nx=2 \n \ny=2 \cdot 2-2 \n\y=4-2 \ny=2 \n \n \hbox{the answer:} \nx=2 \n y=2$

Answer 2

Answer: 4x-2y=4
8x+2y=20

12x=24
x=24/12
x=2

sub x into 8x+2y=20
8(2)+2y=20
16+2y=20
2y=20-16
2y=4
y=4/2
y=2

solution (2,2)

check
4x-2y=4(2)-2(2)=4
8x+2y=8(2)+2(2)=16

hope this helps

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Factor:
75^2 – 2(75)(25) + 25^2

Answers

hello,

75²-2*75*25+25²=(75-25)²=50²=5²*10²=2²*5^4
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HELP I WILL GIVE 50 POINTS AND BRAINLIEST TO WHOEVER ANSWERS FIRST Graph y>1−3x.

Answers

Answer:

The last graph

Step-by-step explanation:

This is because when there is a greater than sign, the line on the graph is dotted and the shaded area is facing upwards. I try to remember that when there is a greater than sign or a greater than or equal to sign, the shaded area faces up towards the sky.

Hope this helps. Please inform me if my answer is wrong.

Answer:

The last graph is correct

Step-by-step explanation:

Hello,

First of all, you need to identify the line y = -3x + 1

This is a line so two points are enough to identify it.

-3*0+1 = 1 so (0,1) is a point of this line and

-3*1 + 1 = -2 so (1,-2) is another point of this line.

I attached a graph of this line.

Now, the inequality is y > 1-3x

It means that we are looking for the part of the plan which is (strictly) above this line.

This is not ( $\geq$ ) inequality but a strict equality ( > ) so the points of the line are not included, so the last graph is the correct one.

Hope this helps.

Do not hesitate if you need further explanation.

Thank you

I need help, if you do help please dont put picture thank you!

Answers

Answer:

181

Step-by-step explanation:

Area of a semicircle: 1/2 (pi • r^2)

1/2(3.14 • 100)

1/2 ( 314 )

157

Triangle:

(6 • 8) ÷ 2

48 ÷ 2

Add the area of the triangle & semicircle together: 157 + 24 = 181

Hope this helps! Have a great day!

This is the most frequently occuring element in a set

Answers

The most frequently occurring element in a set of values is called the mode.
Hope that helped =)

For the school recycling project, the seventh grade collected sixteen more than five times as many cans as the eighth grade. The seventh grade collected 251 cans. Select all of the equations that can be used to find the number of cans, c, the eighth grade collected.5c=251−16

5c=251+16

5c+16c=251

5c+16=251
which one?

Answers

251-16=235

235/5=47

so a

Answer:don't know like if you want

Step-by-step explanation: H I H I H I H I

a 3-inch candle burns down in 12 hours.Assuming the candles are the same thickness and make (that is, directly proportional),how long would it take for a 1-inch candle to burn down?