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Ivahew [28]
3 years ago
12

There are 20 boys and 20 girls in a classroom.

Mathematics
1 answer:
Ede4ka [16]3 years ago
7 0

Answer:20

Step-by-step explanation:

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PLEASE HELP ME!!!! I NEED TO TURN IN THIS IN 15 MINUTES
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Answer: i cant see it

Step-by-step explanation:

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2 years ago
Which statement about the figure is true
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It is answer D does that help?
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Read 2 more answers
How many solutions does the system have?<br> 8x + 2y = 14<br> (8x + 2y = 4
e-lub [12.9K]

Answer:

zero

Step-by-step explanation:

they are parallel once graphed

3 0
3 years ago
Tests for tuberculosis like all other diagnostic tests are not perfect. QFT-G is one of such tests for tuberculosis. Suppose tha
Sauron [17]

Answer:

the probability of an adult getting a NEG result and truly having tuberculosis is 0.0127

Step-by-step explanation:

S = the adult really has tuberculosis.

S' = complement of S = the adult does not has tuberculosis.

POS = the test gives a positive result

P(S)= 0.05

P(POS | S)=0.746

P(NEG | S')= 0.7653

this is an intersection because the "and" word

P(NEG ∩ S) =  P(NEG| S)*P(S)=(1-P(POS | S))*P(S)=(1-0.746)*0.05=0.0127

6 0
3 years ago
PLEASE HELP!!! <br><br> Which equation represents this ellipse?
Alona [7]

Answer:

y²/25+x²/4=1

Step-by-step explanation:

The equation for an ellipse is either categorized as

x²/c² + y²/d² = 1 . In such an equation, the vertices on the x axis are categorized by (±c,0) and the vertices on the y axis are (0, ±d)

In the ellipse shown, the vertices/endpoints on the x axis are (-2,0) and (2,0). This means that c is equal to 2. Similarly, on the y axis, the endpoints are (5,0) and (-5,0), so d=5.

Our equation is therefore x²/2²+y²/5²=1 = x²/4+y²/25=1

Our answer is therefore the fourth option, or

y²/25+x²/4=1

5 0
2 years ago
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