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salantis [7]
3 years ago
9

A. B. AB ≅ AC C. D. CS ≅ ST

Mathematics
1 answer:
Lemur [1.5K]3 years ago
4 0

Answer:

what are the rest of the choices, if the ones are the top ones they dont make sense.

Step-by-step explanation:

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A test has 50 questions. each right answer is worth 2 points; each wrong answer deducts 0.5 points; blank answers are not counte
mestny [16]

ANSWER: There are 2 blank answers

 

EXPLANATION

 

Let

The number of right answers be ‘r’

The number of wrong answers be ‘w’

The number of blank answers be ‘b’

 

r + w + b = 50

This means r + w ≤ 50

 

Then we know,

Right answers = 2 marks

Wrong answers = -0.5 mark

Blank Answers = 0 marks

 

2r – 0.5w = 88.5

2r = 88.5 + 0.5w                               … (Equation I)                   

 

Since the score as .5, we know that there is at least one wrong answer, and the number of wrong answers is an odd number.

 

Since the score is 88.5, and each right answer gives 2 marks

There are at more than 44 (i.e. 88/2) right answers

 

Since r + w ≤ 50, and possible values of w are odd numbers

If r = 45, Possible values of w are 1, 3, and 5

If r = 46, Possible values of w are 1, 3

If r = 47, Possible values of w are 1, 3

If r = 48, The only possible value of w is 1

If r = 49,The only possible value of w is 1

 

 

Since 2r = 88.5 + 0.5w  (Equation I)

We test for possible values:

 

If r = 45

2r = 88.5 + 0.5w  

2(45) = 88.5 + 0.5w  

90 = 88.5 + 0.5w

0.5w = 90 – 88.5

0.5w = 1.5

w = 3

 

So,

If there are 45 right answers

There are 3 wrong answers

r + w + b = 50

45 + 3 + b = 50

48 + b = 50

b = 50 – 48

b = 2

Then, there are 2 blank answers.

 

If r = 46

2r = 88.5 + 0.5w

2(46) = 88.5 + 0.5w

92 = 88.5 + 0.5w

0.5w = 92 – 88.5

0.5w = 3.5

w = 7

 

So,

If there are 46 right answers

There are 7 wrong answers

We know that r + w ≤ 50

46 + 7 = 53

So 46 and higher numbers are not possible solutions.

 

The only possible solution is:

There are 45 right answers

There are 3 wrong answers

<span>There are 2 blank answers</span>

6 0
3 years ago
What is the slope of (1,-3) and (-5,-4)
egoroff_w [7]

Answer:

slope is 1/6

Step-by-step explanation:

3 0
3 years ago
Volume is the amount of blank inside a three-dimensional figure
Softa [21]

Answer: Volume is the amount of enclosed space inside a three dimensional figure.

Step-by-step explanation:

3 0
3 years ago
On a coordinate plane, what is the distance between the points (3,-6) and (-14, -6)
madreJ [45]

Answer:

The distance between both points would be of 17 units

Step-by-step explanation:

they have the same value through the y-axis. However if you count the spots from 3 to -14 their x values are 17 units apart.

7 0
3 years ago
Write log2 0.25 = -2 in exponential form​
oee [108]

Answer:

0.25 = 2^-2

The "^" means that -2 is an exponent on top of 2.

6 0
3 years ago
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