System of equations by substitution
how do this?
y= x+2
y= -4x+7

Answers

Answer 1

Answer: Equations are given,
y= x+2

y= -4x+7

As you can see both the expressions, x+2 and -4x+7 are equal to "y". That means they are equal to each other too.

So let's equal them and solve it.

$x+2=-4x+7\n \n x+2+4x=7\n \n x+4x+2=7\n \n 5x+2=7\n \n 5x=7-2\n \n 5x=5\n \n x=\frac { 5 }{ 5 } \n \n x=1$

Now we have x's value we will plug it in the first equation to find "y".

$x=1\n \n y=x+2\n \n y=1+2\n \n y=3$

(1,3)

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Answers

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Answers

$Probability = (Number of outcomes)/(Total numbers of outcomes)$
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The table shows Janisa’s scores in an archery tournament qualifying event.A 1-column table with 6 rows. Column 1 is labeled Janisa's Scores with entries 10, 10, 8, 8, 3, question mark.

Janisa needs a mean score of 8 to qualify for the archery tournament. How many points does she need on her last arrow to qualify for the tournament?

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Answers

Answer:

this should help

Step-by-step explanation:

Answer: Janisa needs to get 10 points on the last arrow to qualify for the tournament.

Step-by-step explanation:

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Answers

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