A copy machine makes 19 copies in 3 minutes and 15 seconds. How many copies does it make per minute?

6

Step-by-step explanation:

It makes 19 copies in 3 minues and 15 seconds

3 minutes and 15 seconds is 195 seconds

195 ÷ 19 = 10 approximately which means the machine makes 1 copy every 10 seconds and 6 copies per minute

5.846 ~ 6copies

Step-by-step explanation:

A copy machine makes 19copies in 3minutes and 15secs

How many copies in per minute

I.e how many copies per minute

Looking at this,

Convert the 3mins 15secs all into mins

I.e convert the 15secs into mins

Remember that 60secs makes 1mins

So 15secs will make x

Cross multiply

15secs ×1= 60secs ×x

X= 15/60

X= 0.25mins

Add to the already 3mins

That makes

=3mins+0.25mins

=3.25mins

Now,

19copies done in 3.25mins

Let the unknown copies be h

19copies in 3.25mins

H copies in 1mins

Cross multiply

H×3.25mins=19×1mins

3.25H=19

H=19/3.25

H= 5.846copies

H=~6copies

So the copying machine makes approximately 6copies per minute

< xcy ≅ < xby

step-by-step explanation:

in δcax and δbax,

so, δcax ≅ δbax (side-angle-side or sas)

since δcax ≅ δbax, we can conclude < acx ≅ < abx

in δacy and δaby,

so, δacy ≅ δaby (side-angle-side or sas)

since δacy ≅ δaby, we can conclude < acy ≅ < aby

now,

< acy ≅ < aby

=> < acx + < xcy ≅ < abx + < xby

=> < acx + < xcy ≅ < acx + < xby   (since < acx ≅ < abx already proved above)

subtracting < acx from both sides, we get

< acx + < xcy -< acx ≅ < acx + < xby -< acx

cancelling out < acx and -< acx from both sides, we get

< xcy ≅ < xby (proved)

the height of the surface increases from the center out to the sides of the road

it is c!