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natima [27]
2 years ago
10

Help - Math Test-need answer immediately I’ll give brainliest.

Mathematics
2 answers:
gavmur [86]2 years ago
6 0

Answer:

maybe c

Step-by-step explanation:

ludmilkaskok [199]2 years ago
5 0

Answer:

The answer is C the 2 rectangles

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In answering a question on a multiple-choice test, a student either knows the correct answer or guesses it. Let 0.7 be the proba
Dahasolnce [82]

Answer:

The probability is 0.9211

Step-by-step explanation:

Let's call K the event that the student know the answer, G the event that the student guess the answer and C the event that the answer is correct.

So, the probability P(K/C) that a student knows the answer to a question, given that she answered it correctly is:

P(K/C)=P(K∩C)/P(C)

Where P(C) = P(K∩C) + P(G∩C)

Then, the probability P(K∩C) that the student know the answer and it is correct is:

P(K∩C) = 0.7

On the other hand, the probability P(G∩C) that the student guess the answer and it is correct is:

P(G∩C) = 0.3*0.2 = 0.06

Because, 0.3 is the probability that the student guess the answer and 0.2 is the probability that the answer is correct given that the student guess the answer.

Therefore, The probability P(C) that the answer is correct is:

P(C) = 0.7 + 0.06 = 0.76

Finally, P(K/C) is:

P(K/C) = 0.7/0.76 = 0.9211

7 0
3 years ago
Which equation could be used to solve the problem? Larry skated 7200 feet in 3 minutes. How many feet per minute did he skate (x
kari74 [83]

A. 7200 feet ÷ 3 minutes = x

Hope it helps!

And happy Pi Day! :D


7 0
3 years ago
Kedar earns a monthly salary of $2,200 plus a 3.75% commision on the amount of his sales at men's clothing store. What would he
Dmitriy789 [7]

Answer:

$2368.75

Step-by-step explanation:

Kedar earns a monthly salary of $2200 and a commission of 3.75%

He sold $4500 this month

The first step is to calculate his commission for this month

His commission can be calculated as follows

= 4500 × 3.75/100

= 4500 × 0.0375

= 168.75

Therefore yr amount earned this month can be calculated as follows

= 2200 + 168.75

= $2368.75

7 0
3 years ago
..............................................................
Karolina [17]

Answer:

................?.........

8 0
3 years ago
Read 2 more answers
The length of a rectangle is 11 in. longer than its width. The perimeter of the rectangle is 86 in.
aliina [53]

Let the width = x then length = x + 11 inches


Perimeter of a rectangle = 2*width + 2*length so we have the equation:-

( letting P = perimeter , L = length and W = width)

P = 2L + 2W

86 = 2(x + 11)) + 2x

86 = 4x + 22

4x = 86-22 = 64


x = 64 / 4 = 16 inches


Therefore the length of the rectangle = 16 + x


= 16 + 11 = 27 inches Answer

4 0
3 years ago
Read 2 more answers
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