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Mathematics 7 Online
OpenStudy (stormoshawty):

Your schools talent show will feature 12 solo acts and ensemble 2 acts. The show will last 90 min. The 6 solo performers judged best will give a repeat performance at a second 60-min show, which will also feature the 2 ensemble acts. Each solo lasts x minutes, and each ensemble act lasts y minutes. A. Write a system of equations to model the situation. B. Solve the system from part(a). How long is each solo act? How long is each ensemble act?

OpenStudy (nikato):

So 12x+2y=90 6x+2y=60

OpenStudy (nikato):

To give u a start, subtract both equations to get x

OpenStudy (stormoshawty):

Is that A?^

OpenStudy (nikato):

And with x, substitute that back to the equation to get y

OpenStudy (nikato):

And yes, do u understand how I got those two equations? .

OpenStudy (stormoshawty):

yes I do.

OpenStudy (nikato):

Ok, so now u just have to solve for x and y

OpenStudy (stormoshawty):

I got a decimal for x.

OpenStudy (nikato):

U shouldnt

OpenStudy (nikato):

When u subtract the ys cancel out

OpenStudy (nikato):

So 6x=30

OpenStudy (stormoshawty):

I thought you added the problems.. ohhh. LOL

OpenStudy (nikato):

No u have to subtract. U wanna try to get rid of one of the variables

OpenStudy (stormoshawty):

So. I got y = 15

OpenStudy (nikato):

Yea, and x?

OpenStudy (stormoshawty):

5

OpenStudy (nikato):

Yup

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