An exam is made of two papers that score differently. paper 1 has 120 marks. paper 2 has 80 marks. maryam scores: 65% on paper 1 80% on paper 2 work out maryam total percentage score for the exam. you must show your working

71 %

Calculate score for each paper, total them and convert to a percentage.

Paper 1 : mark = 0.65 × 120 =78

Paper 2 :mark = 0.8 ×80 = 64

Total mark = (78 + 64)/200 =142/200

Percentage score = 142/200 × 100 % = 71 %

Maryam TOTAL percentage score for the exam is:

                             71%

Paper--1

 Total marks=120 marks.

The percent score scored by Maryam is:  65%

This means that the score scored by Maryam is: 0.65×120=78

Paper--2

   Total marks=80

The percent score scored by Maryam is:  80%

This means that the score scored by Maryam is: 0.80×80=64

Hence, Total marks of both the paper are: 120+80=200 marks

Marks scored by Maryam in both the subjects is: 78+64=142 marks

Hence, Total percentage score for the exam is:

           Hence, her total percent score is:

                         71%

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

sine

step-by-step explanation: