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erik [133]
2 years ago
9

Is substitutions the best method to use when one variable is already known

Mathematics
2 answers:
8_murik_8 [283]2 years ago
8 0
There’s two ways to substitute, but i think you mean if you know x but don’t know y. if that is true, then yes use substitution
Mama L [17]2 years ago
7 0
Substitution Method is used for solving equations in 2 Variables, where you find the value of one variable in terms of the other and then substitute that value into any one of the equations. It can also be used when one Variable is known to you and you have to find the other.
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Will put brainliest thank you
Yuliya22 [10]

Answer:

A: 0.64

Step-by-step explanation:

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5 0
2 years ago
1/3·(−3x+4y−5z) help plz
Maksim231197 [3]

Answer:

To solve this we need to form 2 equations with only 2 variables.

x+4y-5z=-7

2x+y+5z=8

3x+5y=1

15x+10y+15z=35

6x+3y+15z=24

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Now we need to use these to find x and y

9x+15y=3

9x+7y=11

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From this we can find that:

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7 0
3 years ago
Read 2 more answers
URGENT PLEASE HELP 15 POINTS
Dimas [21]

Answer:

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Step-by-step explanation:

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5 0
3 years ago
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Angles L and M are supplementary. What is the sum of their measures? The sum of the measures of angles L and M is
Reil [10]
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3 0
2 years ago
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Mashcka [7]
<span>1/r + 2/1-r = 4/r^2

1-r+2r/r(1-r)=4/r^2
(1+r)/r(1-r)=4/r^2   cancle r both side

1+r/1-r=4/r

cross multiply 
r+r^2=4-4r
r^2+4r+r-4=0
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r^2+4r+r-4=0
solve it for r factor it...



</span>
6 0
2 years ago
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