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Sholpan [36]
3 years ago
11

X - 3y = 1 3x - 5y = 11

Mathematics
2 answers:
Anon25 [30]3 years ago
7 0
The answers are...
x=7
y=2
Debora [2.8K]3 years ago
7 0
I would isolate x in the first equation:

x = 3y + 1

For the second equation, you could just substitute the x inside:

3x - 5y = 11
3(3y +1) - 5y = 11
9y + 3 - 5y = 11
4y + 3 = 11
4y = 8
y = 2

Using the y = 2, we can find x.

x = 3y + 1
x = 3(2) + 1
x = 7

x = 7 and y = 2
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3 years ago
Brian bought a new air conditioning unit on his credit card. The unit had a base price of $435. Brian made no other purchases on
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Answer:

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Step-by-step explanation:

Given:

Unit base price: $435

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Waitresses all want to work the "high roller" room at a local restaurant. There are six waitresses each evening assigned to one
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Answer:

The expected amount earned by a waitress per evening is $95.83.

Step-by-step explanation:

At a local restaurant there are six rooms total; 1 is a "high roller" room and other 5 are normal rooms.

There are 6 waitresses working at the local restaurant.

The room assignments are made by fair random selection such that each waitress has an equal probability of being in the "high roller" room.

This implies that a waitress can be assigned any of the six rooms with probability, \frac{1}{6}.

The tip earned by the waitress working in the "high roller" room is $200 and that for other rooms is $75.

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P (X):     \frac{1}{6}          \frac{1}{6}         \frac{1}{6}          \frac{1}{6}         \frac{1}{6}         \frac{1}{6}

The expected value of a random variable is given by:

E(X)=\sum x\cdot P (X)

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Thus, the expected amount earned by a waitress per evening is $95.83.

3 0
3 years ago
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