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maksim [4K]
2 years ago
5

URGENT PLEASE HELP Students in Mrs. Barnes’s class determined the probability that she will check homework on a randomly chosen

day is 0.42. They also determined the probability that she will give a pop quiz when she checks homework is 0.6, and the probability that she will give a pop quiz when she does not check homework is 0.9.
What is the probability that Mrs. Barnes does not check homework if the students take a pop quiz?
The probabilities are displayed in the tree diagram.

A) 0.25

B) 0.33

C) 0.67

D) 0.77

Mathematics
1 answer:
dezoksy [38]2 years ago
6 0

Answer:

0.67

Step-by-step explanation:

Edge 2021

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Please Answer
Lapatulllka [165]

Answer:

Part A: C. 4 to 1

Part B: 2

Step-by-step explanation:

<h3>Part A: </h3>

What is the ratio of the number of students receiving a C and the number of students receiving an A?

<u>As per table given:</u>

  • 12 students received a C and 3 students received a A

The ratio C/A is:

  • 12/3 = 4/1

The correct answer choice is:

  • C. 4 to 1
<h3>Part B: </h3>

Complete the statement:

For every student receiving a D, ______ students received a B.

<u>As per table given:</u>

  • 4 students received a D and 8 students received a B

<u>The ratio D/B is:</u>

  • 4/8 = 1/2

<u>The statement is:</u>

  • For every student receiving a D, 2 students received a B.
7 0
3 years ago
What two numbers multiply to -16 and add to 6
joja [24]

Answer:

8 and -2

Step-by-step explanation:

8 (-2) = -16

8 + (-2) = 6

3 0
3 years ago
A hotel wants to put a fence around a circular spa. The radius of the spa is feet. If the fence is built along the immediate edg
MariettaO [177]

For this case we must find the perimeter of the fence, in a circular way, knowing that the perimeter of a circle is given by:

P = 2 \pi*r

Where "r" represents the radius of the circle, in this case r = \frac {5} {\sqrt {2} -1}

Substituting in the perimeter equation we have:

P = 2 \pi * \frac {5} {\sqrt {2} -1}

Rationalizing we have:

P = \frac {2 \pi * 5 (\sqrt {2} +1)} {(\sqrt {2} -1) * (\sqrt {2} +1)}\\P = \frac {2 \pi*5 \sqrt {2} +2 \pi*5} {2-1}\\P = 10 \pi \sqrt {2} +10 \pi

Taking out common factor \pi:

P = (10 \sqrt {2} +10) \pi

Answer:

P = (10 \sqrt {2} +10) \pi\ feet

Option C


3 0
3 years ago
On a coordinate plane, the points are (3, 1), (6, 2), (8, 3), (12, 4).
ArbitrLikvidat [17]

Answer:

it would be 8 to 3

which is not equivalent

Step-by-step explanation:

the reason why is because of this

3, 6, 9, 12.

not:

3, 6, <em>8, </em>12.

5 0
3 years ago
Read 2 more answers
4. A yellow cab Taxi charges $5.00 flat rate in addition of $0.65 per mile. Jan has no more than $20 to spend on a ride.
gogolik [260]

Answer:

5+0.65x\le 20

Step-by-step explanation:

Let x be the number of miles Jan can drive in a taxi.

The cost of this ride consists of

  • $5.00 flat rate
  • $.065 per mile

So, per x miles Jan will pay $0.65x and the total cost of the ride will be

$5.00+$0.65x

Jan has no more than $20 to spend on a ride, then the total cost of his ride must be less or equal to $20. Mathematically, you can write this as

5+0.65x\le 20

6 0
3 years ago
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