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cricket20 [7]
3 years ago
7

Please solve-y(2+4y)

Mathematics
1 answer:
Elina [12.6K]3 years ago
8 0
To solve this, you distribute the -y to both terms, 2 and 4y.
It will look something like this: (2*-y)+(4y*-y)
When you simplify, look for any like terms that can be combined, and if none, then leave it as it is. 
Your final answer will be: -2y-4y^2
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Solve the system by substitution <br><br> -x-y-z= -8<br><br> -4x+4y+5z= 7<br><br> 2x+2z= 4
Gennadij [26K]
- x - y - z = - 8 ------- (1)
- 4x + 4y + 5z = 7 -------- (2)
2x + 2z = 4 --------- (3)

From (3): x + z = 2
                      x = 2 - z --------- (4)

Substitute (4) into (1),
- x - y - z = - 8
- (2-z) - y - z = - 8
- 2 + z - y - z = -8
- 2 - y = - 8
2 + y = 8
Therefore, y = 6

Substitute y = 6 and (4) into (2),
- 4x + 4y + 5z = 7
- 4(2 - z) + 4(6) + 5z = 7
- 8 + 4z + 24 + 5z = 7
9z + 16 = 7
9z = - 9
Therefore, z = - 9

Substitute z = - 9 into (4),
x = 2 - z
x = 2 - (-9)
x = 2 + 9
Therefore x = 11

Solution:
x = 11
y = 6
z = -9
4 0
3 years ago
Read 2 more answers
A rope weighs 400 grams per meter of length. What is the weight in kilograms of 6.3 m of this rope
torisob [31]
<span>A rope weighs 400 grams per meter of length.
length=6.3m

400*6.3=2520g
2520g=2520/1000kg=2.52kg

The answer is D.</span>
7 0
3 years ago
YO I NEED THIS A.S.A.P
Kitty [74]

Answer:

you can get 4 of each

Step-by-step explanation:

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melisa1 [442]
9.4 is the distance coming back with pythagorean theorem
add the original 13 miles
22.4 miles
7 0
3 years ago
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