Question

(1) If x,y and z are the rational numbers, then the property (x+y)+z = x+(y+z) is known as
1. Commutative property
2.
Associative property
3. Distributive property
4. Closure property
(2) Identity element for subtraction of rational number is
(1) 1
(2) 0
(3)-1
(4) Doesn't exist
(3) If 8/7= x-35 then x =?
(1)-8
(2) 40 (3) -40
(4) 8
(4) If measure of two angles of triangle are 80° and 50° then the triangle will be
1. Scalene (2)Isosceles (3) Equilateral (4) None
(5) The point of concurrence of the altitude of a triangle is called
1. Orthocentre (2) circumcentre (3)centroid
(4) Incentre
(6) Diameter of a circle whose circumference is 22 cm is.....
1. 3.5 cm
(2) 7 cm
(3) 14 cm
(4) 14 cm
(7) Area of a field is 500000 m: its area in hectare is
1. 500 hectares (2) 50 hectares (3) 5 hectares (4) 5000 hectares
(8) Which of the following is a solution of the equation 3x - 7 = 7 - 4x
1. x = 0
(2) x = 14
(3) x = 2 (4) x = 1
Section 'B' 2 Marks Each
(9) Verify x+y = y + x if x= 5/7, y=-3/2
(10) By what number should (-3): be multiply so that the product may be equal to 9.
(11) If p/q = (4). * (%) , find the value of (p/9).
(12) The salary of a person was increased by 15 percent. If his salary now is Rs 9936. What was
his initial salary.
(13) Find the priduct of (7p-39) (2p + 59).
(14) Find the
value of y if 13x (y - 4) -3 (y - 9) = 5 (y+ 4).
(15) Triangle PQR is an isosceles triangle with PQ = PR, if <R = 42°.
Find the measure of <P?.
(16) In an isosceles triangle the base angle is twice as large as vertex angle. Find the angles of the
triangles.
Section C 4 Marks Each
(17) Show that the bisector of the vertical angle of an isosceles triangle bisect the base at right
angle.
(18) A painting 40 cm long and 28 cm wide is painted on a cardboard such that there is a margin
of 2 cm along each of its sides. Find the total area of the margin.
(19) Two concentric circles have radii of 14 cm and 7 cm respectively. Find the area of space
between them.
(20) Mean of 8 number is 27. If one more number is included, then the mean is 26. Find the
included number.
(21) Find x if 48% of 480 + 25% of 250 - x = 200.
(22) Rahul buys an almirah for Rs 2000 and spends Rs 400 as transportation charge. If he sell the
almirah for Rs 3000, determined his profit %.
(23) By what number should (-512). be divided so that the quotient may be equal to(8)
(24) Simplify (2.-3.): + (6 +81).​

Answer 1

Answer:

1) associative

4) isosceles

7) 50 hectares

8) x = 0

Step-by-step explanation:

please mark me as brainliest

Answer 2

Your

Answer:

in

Pic

Question:

Verify that x+y = y + x for each of the following

(a)

−3

5

and −7

10

(b) 5

7

and −8

11