Question

plz help me it's urgent

Answer 1

Answer:

1. x=4

3x^3+9x^2-x+8

= 3×4×4×4+9×4×4-4+8

=3×64+9×16-4+8

=192+138-12

=342

2.Mr.Malkani saves 22% of his income

His salary is Rs.12750

He saves=

22×12750/100

= Rs.2805

His expenditure=

Rs.(12750-2805)

=Rs.9945(ANS)

Answer 2

1. 3x³+9x²-x+8

3(4)³+9(4)²-4+8

64*3+16*9+4

192+144+4

340

2. savings = ₹(22/100*12750)

= ₹2805

expenditure = ₹(12750-2805)

= ₹9945

3. 3x-1 = 11

4

3x= 45

x= 15

4. 18*4 -3y = 11+y

4

72-3y = 44+4y

28 = 7y

4 = y

5. mean = 1+3+5+7+9/5

= 25/5

= 5

6. mean = 2+4+6+8+10/6

= 30/6

= 5