14 punctuation marks

Serena wrote a test that had 35 questions. 14 out of these were marked wrong. How many questions were marked right? => 19 or 12 or 21 or 31..

Question: Prove that the quadrilateral formed by the four points A (-1, -6), B (2, -5), C (7, 2) and D (4, 1) is a parallelogram. [3 Mark] Answer: AB = DC and BC=AD Since the opposite sides of the quadrilateral ABCD are equal, ABCD is a parallelogra..

Question: In the given figure, XY||BC. Find the length of XY. [2 Mark] Answer: In D AXY and D ABC, (common angle) (By definition of similar..

Question: Abscissa of a point P equals its ordinate. If P is equidistant from A (5, -3) and B (8, - 4), find the coordinates of the point P. [3 Mark] Answer: Given, Abscissa = ordinate for a point. P = (a, a) By distance formula, But PA = PB..

Question: Prove that in any triangle the sum of the squares on any two sides is equal to twice the square on half the third side together with twice the square of the median. [5 Mark] Answer: Given: In D ABC, AD is the median. To prove: AB 2 + AC 2 = 2BD 2 + 2AD 2 ..

>Write brief and precise letters. The student is not expected to use all the lines provided (in a formal letter). If the content is incorrect, no marks are awarded for format. Mention dates, amount and other specifications, relevant to the content of the letter very clearly. Underline key..

Question: Given below are the marks of 25 students in a test: 18, 5, 3,2,10,14,15,19,20,22,12,14,8,9,11,12,14,15,6,21,16,17,8,6. i) Using the class interval 0 - 5, 5 - 10, etc, construct a frequency table. ii) Find the class marks of each class..

Question: In what ratio does the point (5, 4) divide the line segment joining the points (2, 1) and (7, 6)? [2 Mark] Answer: Let P (5, 4) divides the line segment AB in the ratio :1 ..

. Portugal has a unique designation of 19.2 carats. In the United States 14 carat predominates, with some 10 carat. In the Middle East, India and South East Asia, jewellery is traditionally 22 carat (sometimes even 23 carat). In China, Hong Kong and some other parts of Asia, "chuk ka..