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iren2701 [21]
3 years ago
12

Evaluate the expression for r = 0 and s = –14. Simplify your answer. r − s s =

Mathematics
1 answer:
const2013 [10]3 years ago
5 0

14 is the answer

Step-by-step explanation:

0+14=14

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10.3.23
Helga [31]

Answer:

The probability that a high school member selected at random is on the swim team is \frac{9}{40} = 0.225

Step-by-step explanation:

Conditional Probability

We use the conditional probability formula to solve this question. It is

P(B|A) = \frac{P(A \cap B)}{P(A)}

In which

P(B|A) is the probability of event B happening, given that A happened.

P(A \cap B) is the probability of both A and B happening.

P(A) is the probability of A happening.

In this question:

Event A: High school student.

Event B: Is on the swin team.

Probability of selecting a high school student:

Of the 1500 students, 200 are on high school. So

P(A) = \frac{200}{1500}

Probability of selecting a high school student who swims:

Of the 1500 students, 45 are high school students who swim. So

P(A \cap B) = \frac{45}{1500}

What is the probability that a high school member selected at random is on the swim team?

P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{\frac{45}{1500}}{\frac{200}{1500}} = \frac{45}{200} = \frac{9}{40} = 0.225

The probability that a high school member selected at random is on the swim team is \frac{9}{40} = 0.225

4 0
3 years ago
4x + 9y = 4
saw5 [17]

Answer:

x=101/65, y=-16/65. (101/65, -16/65).

Step-by-step explanation:

4x+9y=4

9x+4y=13

----------------

9(4x+9y)=9(4)

-4(9x+4y)=-4(13)

------------------------

36x+81y=36

-36x-16y=-52

----------------------

65y=-16

y=-16/65

4x+9(-16/65)=4

4x-144/65=4

4x=4+144/65

4x=404/65

x=(404/65)/4=101/65

x=101/65, y=-16/65.

7 0
3 years ago
You lean a 30 foot ladder against your house and it reaches exactly to the top. The ladder makes a 24 degree angle with the grou
Furkat [3]
Sin 24 = h/30 

<span>h = 30 sin 24 = 12.2 ft </span>
5 0
4 years ago
Solve for x and y<br> y+2x=2<br> y=-4x+10
Katena32 [7]

Answer:

x=4 and y=(-6)

Step-by-step explanation:

Solve for the first variable in one of the equations, then substitute the result into the other equation.

7 0
3 years ago
What is an ecosystem?
Phoenix [80]

Answer:

4

Step-by-step explanation:

8 0
3 years ago
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