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777dan777 [17]
2 years ago
10

Solve the system of linear equations by substitution. 9. 2x+3y=25 and 4x-y=15

Mathematics
1 answer:
lana66690 [7]2 years ago
4 0
2x+3(4x-15)=25
14x-45=25
14x=70
x=5
y=5
(5,5)
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You are dealt one card from a​ 52-card deck. find the probability that you are not dealt a two
Rina8888 [55]

There are 52 cards in a deck.

First we find the probability of drawing a 2

There are 4 cards that shows 2

Probability of drawing a 2 card fro 52 cards = 4 / 52

We know that P( not A) = 1 - P(A)

So the probability (not dealt a 2) = 1 - probability (dealt a 2)

= 1 - 4/52

= (52 - 4)/ 52 = 48/52

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7 0
3 years ago
28 divided by 7 2 x 3 =
gregori [183]
I think the Answer is 24.
3 0
3 years ago
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I need help with making predictions with probability please help me correctly answer these questions.
Semmy [17]

Answer:

1. So the porpotion should be 25/100 = x/120

You have this because you know that 25% of the dogs who go to ABC veterinarian need a rabies booster. So 100% of the dog should be 120 dogs, and now our job is to find how many dogs make up 25% percent of the total number.

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Another way of understanding this is that you have to find 25% of the total amount, so just take that total number and multiply it with 25% or 25/100 which is 0.25 as well, that's why we multiply it with 25 first and then divide it to 100 later.

2.

*I guess there is no need of explaining it

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6 0
3 years ago
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WINSTONCH [101]
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2 years ago
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Aloiza [94]
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