Question

a test has 80 questions.there is one mark for a correct answer.while there is a negative penalty of -1/2 for a wrong answer and -1/4 for an unattempted question what is the number of qiestion answeredcorrectly if the student has scored a net total of 34.5marks​

Answer 1

Answer:

"Equation for the total problems:

X + Y = 108

The incorrect problems and the correct must add up to the total.

Equation for the score that they got:

X - Y/3 = 0

Now you can use the substitution or elimination method to single out a variable.

X - Y/3 = 0

X = Y/3

3X = Y

Now we substitute 3X for Y in the first equation.

4X = 108

X = 27

We can now plug that in to this equation:

3X = Y

3 * 27 = Y

Y = 81

And there is the two parts of the answer "

Answer 2

Answer:

"Equation for the total problems:

X + Y = 108

The incorrect problems and the correct must add up to the total.

Equation for the score that they got:

X - Y/3 = 0

Now you can use the substitution or elimination method to single out a variable.

X - Y/3 = 0

X = Y/3

3X = Y

Now we substitute 3X for Y in the first equation.

4X = 108

X = 27

We can now plug that in to this equation:

3X = Y

3 * 27 = Y

Y = 81

And there is the two parts of the answer "

Answer 3

Answer:

"Equation for the total problems:

X + Y = 108

The incorrect problems and the correct must add up to the total.

Equation for the score that they got:

X - Y/3 = 0

Now you can use the substitution or elimination method to single out a variable.

X - Y/3 = 0

X = Y/3

3X = Y

Now we substitute 3X for Y in the first equation.

4X = 108

X = 27

We can now plug that in to this equation:

3X = Y

3 * 27 = Y

Y = 81

And there is the two parts of the answer "

Answer 4

Answer:

"Equation for the total problems:

X + Y = 108

The incorrect problems and the correct must add up to the total.

Equation for the score that they got:

X - Y/3 = 0

Now you can use the substitution or elimination method to single out a variable.

X - Y/3 = 0

X = Y/3

3X = Y

Now we substitute 3X for Y in the first equation.

4X = 108

X = 27

We can now plug that in to this equation:

3X = Y

3 * 27 = Y

Y = 81

And there is the two parts of the answer "