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PolarNik [594]
3 years ago
15

Surface area & volumeNeed some help please

Mathematics
1 answer:
seraphim [82]3 years ago
7 0
I know that v = l x w x h 
(volume = length x width x height)
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7y-(9+4y)= -3<br> y=?<br> Rest in peace 999
jeka57 [31]

Answer:

y = 2

Step-by-step explanation:

Given

7y - (9 + 4y) = - 3 ← distribute parenthesis by - 1

7y - 9 - 4y = - 3 , that is

3y - 9 = - 3 ( add 9 to both sides )

3y = 6 ( divide both sides by 3 )

y = 2

5 0
2 years ago
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Solve 5n-7p+3n=25p for n
Gnesinka [82]

Answer:

n=4p

Step-by-step explanation:

Isolate the variable by dividing each side by factors that don't contain the variable.

5 0
3 years ago
Which expression is equivalent 3m+1-m? <br> 2+ m-1+m<br> 1+m<br> 3m-1<br> 3m
Papessa [141]

Answer:

2+ m-1+m..............

7 0
2 years ago
∡C and ∡D are supplementary angles. If m∡D is nine less than twice m∡C, find m∡D.
Gala2k [10]

Answer:

D is 117

Step-by-step explanation:

Let the measure of angle C be x

The measure of D is 9 less than twice C

Mathematically that is 2x-9

If both are supplementary, they add up to be 180

Thus;

x + 2x - 9 = 180

3x = 180 + 9

x = 189/3

x = 63

Recall;

D = 2x-9= 2(63) -9 = 126 -9 = 117

6 0
2 years ago
Please only do 2 through 6
finlep [7]

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