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dolphi86 [110]
3 years ago
10

I need help please help me im struggling please show WORK and tell me how to do it NO links please.

Mathematics
1 answer:
stellarik [79]3 years ago
3 0

Answer:

- 7y +3 =-25

-7y=-25—3

-7y=-28

-7y÷-7= -28÷-7

y=4

Step-by-step explanation:

Take +3 to the side so that your variable and a constant is on their own sides. When a number goes over the equals sign the sign changes at becomes the inverse that's why l said - 3. You now calculate - 25—3 equals 28 then divide by 7 to find y and your y is 4.

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8x+5y=24<br><br> y=-4x<br><br><br> Solve for y and x
Cloud [144]

Answer:

x= -2           and y= 8

Step-by-step explanation:

8x+5y=24-------A

y=-4x---------B

Putting the value of y from B in A

8x+5(-4x)=24

8x +(-20x)= 24

8x-20x=24

-12x=24

x= -24/12

x=-2--------C   y =-4(-2)=8

8 0
3 years ago
Bonsoir pour vais vous m'aider svp développer et réduire l'expression D=(2x+3)²-(x+4)² et factoriser D Svp aider moi
GalinKa [24]

Answer:

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C'est la réponse j'espère que ça aide.

5 0
3 years ago
What’s the answer? Pls help soon
Vilka [71]
You get this or no??
6 0
3 years ago
Read 2 more answers
What is the surface area of a rectangular prism?<br><br>length : 3<br>width : 3<br>height = 5
elixir [45]
Since it is a rectangular prism, the front and back are the same. the sides are the same and the top and bottom are the same. You would find the area of the front and back first. Since they both have the same measurements, you can find the area of one of the faces and multiply by 2.
A=BH
A= 3x5
A=15
15x2=30
So the front and back's area is 30. Now you find the area of both sides. They are both rectangle so the formula is A=BH.
A=BH
A=3x5
A=15
15x2=30
Now you find the area of the top and bottom. It is also a rectangle so you will use the same formula.
A=BH
A=3x3
A=9
9x2=18
Finally, you add all these measurements together adn that is the surface area. 
This surface area of this rectangle prism is 78.
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3 years ago
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Anestetic [448]
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8 0
3 years ago
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