Anna is x years old and her sister is 5 years older. How old was her sister 5 years ago?

Mathematics

1 answer:

777dan777 [17]2 years ago

8 0

Answer:

$x$

Step-by-step explanation:

$x + 5 - 5 = x$

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Happy finds and keeps change she finds around her house recently she learned she has all nickels and quarters she has twice as m

alex41 [277]

Answer:

happy has 25 quarters in total

8 0

2 years ago

Sketch the graph of each line.<br> 2x-5y=25

ki77a [65]

Well, you transform the standard form equation into slope-intercept form (y=mx+b), since you can only graph it using this form.

First of all, the layout of the equation is $Ax+By=C$

So, in this case, A is 2, B is 5, and C is 25.

Now, to put it into slope intercept form, you either use the formula to change it and solve it:

$y= \frac{-A}{B}x+ \frac{C}{B} \\ y= \frac{-2}{-5}x+ \frac{25}{-5} \\ \\ y= \frac{2}{5}x-5$

Or you can just solve for y:

$2x-5y=25 \\ 2x-5y-2x=25-2x \\ -5y=-2x+25 \\ \frac{-5y}{-5}= \frac{-2x+25}{-5} \\ \\ y= \frac{2}{5}x-5$

In addition, I attached what the graph looks like.

Hope this helps!