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3 years ago

How to solve linear equation

Mathematics

2 answers:

ch4aika [34]3 years ago

6 0

Answer:

1.Step 1: Simplify each side, if needed.

2.Step 2: Use Add./Sub. Properties to move the variable term to one side and all other terms to the other side.

3.Step 3: Use Mult./Div. ...

4.Step 4: Check your answer.

I find this is the quickest and easiest way to approach linear equations.

5.Example 6: Solve for the variable.

Nata [24]3 years ago

4 0

You can use elimination and substitution method

EXAMPLE :

Given :

2x + y = 5

3x - 5y = 1

2x + y = 5 (× -5)

3x - 5y = 1

__________

-10x - 5y = - 25

3x - 5y = 1

____________ _ (elimination)

-13x = - 26

x = - 26/-13

x = 2

Substitution x = 2 to 2x + y = 5 :

2x + y = 5

2(2) + y = 5

4 + y = 5

y = 5 - 4

y = 1

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juin [17]

Answer:

he makes 14 field goals and 7 extra point kicks

Step-by-step explanation:

f=#of field goals
e=extra kick points
f+e=21
3f+1e=49
subtract top from bottom
2f=28
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4 years ago

Tim has 3 blue shirts and 2 red shirts in a drawer. He randomly picks one shirt, puts it back, and then picks another shirt. Wha

suter [353]

Answer:

D-6/25

Step-by-step explanation:

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3 years ago

Joey and Armando live on the same st as the park. The park is 9/10 mile from Joey's home. Joey leaves home and walks to Armando'

AleksandrR [38]

Let's start by assuming Armando's house is between Joey's and the park.

Let $x$ be the distance Joey walked to Armando's house.

<span>The park is 9/10 mile from Joey's home. Joey leaves home and walks to Armando's home. Then Joey and Armando walk 3/5 mile to the park.

</span> $\dfrac{9}{10} = x + \dfrac{3}{5}$

$x = \dfrac{9}{10} - \dfrac{3}{5} = \dfrac{9}{10} -\dfrac{6}{10} = \dfrac{3}{10}$

That's probably the answer they're looking for. But what if the park is between Joey and Armando's houses or Joey is between the park and Armando? (The latter isn't really possible with the given distances.)

Let $a, b, c$ be the distances between three collinear points like we have here. Our equation is really a few equations in one, something like

$\pm a \pm b = \pm c$

Let's get rid of the plus/minuses. Squaring,

$a^2 + b^2\pm 2ab = c^2$

$\pm 2ab = c^2-a^2-b^2$

$4a^2b^2 = (c^2-a^2-b^2)^2$

For us, that's a quadratic equation for $c^2$

$4(9/10)^2(3/5)^2= (c^2-(9/10)^2 - (3/5)^2)^2$

I'll skip right to the solutions,

$c^2=\dfrac{9}{100} \textrm{ or } c^2=\dfrac{9}{4}$

$c=\dfrac{3}{10} \textrm{ or } c=\dfrac{3}{2}$

We could have gotten the 3/2 just by adding 9/10+3/5 but this was more fun.

6 0

4 years ago

Pleaseee helpppp I really need it now please

lozanna [386]

Answer:

c = 60

Step-by-step explanation:

A triangle = 180 degrees

180-(15+105)=c

c=60

5 0

3 years ago

Find the slope of (-10,-4) and (5,5)

ValentinkaMS [17]

Answer:

15/9... i believe :)

7 0

3 years ago

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