Question

please tell these questions please....i will mark you as brilliant​

Answer 1

➼ Answer ➼

(Q4) (a) 110°

(Q5) (z - 5) (z + 9)

= z (z + 9) - 5 (z + 9)

= z² + 9z - 5z - 45

= z² + 4z - 45

Hence, the answer is (a) z² + 4z - 45

(Q6) (d) 2

(Q7) 65° and (5x + 15)° are supplementary angles hence  their sum equals to 180°.

65° + (5x + 15)° = 180°

65 + 5x + 15 = 180°

65 + 15 + 5x = 180

80 + 5x = 180

5x = 180 - 80

5x = 100

x = 100 ÷ 5

x = 20

Verification:

LHS = 65 + (5x + 15)

= 65 + (5 × 20 + 15)

= 65 + (100 + 15)

= 65 + 115

= 180

RHS = 180

Hence, the value of x in the given figure is (a) 20

☆ Hope it Helps ☆

Answer 2

Answer :-

(Q4) (a) 110

(Q5) (a) z² + 4z - 45

(Q6) (d) 2

(Q7) (a) 20