Due to inflation, prices increased by 45% and then dropped by 20%. By what percent did prices increase overall?

2 answers:

7 0

Because you increased by the percent THEN decreased by a different percent, you subtract both percents because they are of like terms. So you do 45%-20% which equals 25% which is what’s left after dropping the total.

Flauer [41]3 years ago

4 0

25%

25% is all that's left after dropping the total.

I hope this helps :)

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Read 2 more answers

Find the specified element in the inverse of the given matrix

JulijaS [17]

What is the given matrix?
you didn't show a matrix.
the components of the matrix are the elements.
and the elements of the inverse matrix are the elements of the inverse matrix
1)
so if matrix A is 1 4 1
2 5 2
3 6 3
2)
14114
25225
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3)
15 24 12
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4)
[A]=(15+24+12=51)-(15+12+24=51)
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6)

15-12 6-6 12-15

12-6 3-3 6-12

8-5   2-2 5-8

7)
3 0   -3

6 0 -6

3 0 -3
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(+)3 (-)0 (+)-3

(-)6 (+)0 (-)-6

(+)3 (-)0 (+)-3
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4 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!

3 0

3 years ago