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3 years ago

5

How to solve systems by elomination

1 answer:

Alex73 [517]3 years ago

5 0

Answer:

try to get rid of one of the variables by multiplying both equations by a numbers to make the variables equal. For example if you want to get rid of the x variable and in the equation it says 3x and 2x, you would multiply the entire equation by 2 and 3 to make them both 6x and because you have to increase the entire equation by the same number to make it equal. Then you would subtract them. This would elimnate a variable. solve the remaining equation. Then continue solving the equation from there by plugging in the variable that you just got. Mark me brainliest.

Step-by-step explanation:

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What is the value of m, if the equation my2+2y−4=0 has exactly one root?

stich3 [128]

Answer:

$m=\frac{-1}{4}$

Step-by-step explanation:

A quadratic equation has one root if the discriminant is 0.

That is we need $b^2-4ac=0$ for this particular question.

Compare the following to find $a,b, \text{ and } c$ :

$ax^2+bx+c=0$

$my^2+2y-4=0$

The variable $x$ is representative of the variable $y$ here.

$a=m$

$b=2$

$c=-4$

Plug in into $b^2-4ac=0$ :

$(2)^2-4(m)(-4)=0$

$4+16m=0$

Subtract 4 on both sides:

$16m=-4$

Divide both sides by 16:

$m=\frac{-4}{16}$

Reduce:

$m=\frac{-1}{4}$

6 0

3 years ago

Read 2 more answers

Write the product in its simplest form<br>-3y.3y4<br>Enter the correct answer.

Sauron [17]

Answer:

$\large\boxed{-9y^5}$

Step-by-step explanation:

$-3y\cdot3y^4=(-3\cdot3)(y\cdot y^4)\qquad\text{use}\ a^n\cdot a^m=a^{n+m}\\\\=-9y^{1+4}=-9y^5$

5 0

4 years ago

Monique worked for 4 hours and earned $39.79. How much would she earn if she worked for 6 hours? I HELP WITH IT RNN

loris [4]

Answer:

x=$59.69

Step-by-step explanation:

We can create a proportion to find the answer.

Thus, we get 4 hr/$39.79=6 hr/$x.

Cross multiplying gives us 4x=238.74, and solving for x gives us $59.685.

We can round to $59.69.

5 0

3 years ago

Plz help I will mark you brainlist plz

Igoryamba

Answer:

No, they can't be the same price

Step-by-step explanation:

There is not a way for them to cost the same amount because they are the same cost per topping.

Hope this helped! :)

4 0

3 years ago

7. Danielle went to the grocery store to buy pies for a family dinner. The manager told her they were having a sale in which she

yaroslaw [1]

No; this is not the right business move

8 0

3 years ago