Question

7. Construct an angle of measure 45° using compass and ruler.

8. Subtract -8y from -3y.

9. Draw any triangle XYZ and mark the points:

a. A, B in the interior of Δ XYZ.

b. C, D in the exterior of Δ XYZ.

10. Convert the following into linear equation:

a. Three times a number y decreased by 1 is 4.

b. 15 less than a number a is 7.

11. A man buys a radio set for ₹900 and sells it for ₹972. What is his profit or loss

percent?

12. Identify any two pairs of perpendicular line segments in each of the following

figures:

Answer 1

Answer:

8) -11y

10) a. 3y-1=4

b. a -15=7

11) C.P. =₹900

S.P.=₹972

profit = S.P. - C.P.

972 - 900

= ₹72

PROFIT%=PROFIT/CP×100

₹72 / 900 ×100

= 8

8% profit

dont know other answers

mark me as a brainliest

Answer 2

Answer:

8. -3y-(-8y) = -3y+8y = 5y

10. a) Three times a number y = 3y

ATQ,

1-3y = 4

3y = -3

y = -1

b) a - 15 = 7

a = 22