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3 years ago

Solve the system of equations using substitution methodx=y+2x+2y=5PLEASE HELP!!

Mathematics

2 answers:

nlexa [21]3 years ago

6 0

Answer:

x=1

y=-1

Step-by-step explanation:

x = y+2

x+2y = 5

y+2 +2y = 5

3y +2 = 5

3y = 3

y=1

x=-1

lana66690 [7]3 years ago

4 0

Answer:

Step-by-step explanation:

Insert y+2 into your x so...

y+2+2y=5

Then solve...

Combine like terms so 2y+y is 2y^2 (squared)

and..

5-2 is 3

you are left with 2y^2 (squared) = 3 is 0.75

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pH measurements of a chemical solutions have mean 6.8 with standard deviation 0.02. Assuming all pH measurements of this solutio

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Answer: 2.14 %

Step-by-step explanation:

Given : pH measurements of a chemical solutions have

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Standard deviation : $\sigma=0.02$

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3 years ago

Solve the following equations for x, if possible. check your solutions. 6/dividex+2 = 3/4

SOVA2 [1]

Solving $\frac{6}{x+2}=\frac{3}{4}$ we get x=6

Step-by-step explanation:

We need to solve $\frac{6}{x+2}=\frac{3}{4}$

Solving:

Cross multiply both terms:

$4*6=3(x+2)\\24=3x+6\\3x=24-6\\3x=18\\x=18/3\\x=6$

Verifying the solution:

Putting x=6 in the question given:

$\frac{6}{x+2}=\frac{3}{4}$

$\frac{6}{6+2}=\frac{3}{4}$

$\frac{6}{8}=\frac{3}{4}$

$\frac{3}{4}=\frac{3}{4}$

Solving $\frac{6}{x+2}=\frac{3}{4}$ we get x=6

Keywords: Solving equations

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ludmilkaskok [199]

The answer is: " $\frac{1}{6}$ " .
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3 years ago

Solve the system of equations using substitution methodx=y+2x+2y=5PLEASE HELP!!​

Solve the system of equations using substitution methodx=y+2x+2y=5PLEASE HELP!!