Question

please ans the all question ​

Answer 1

Step-by-step explanation:

2)!1/2-3/2

=-2/2=-1

5) use formula method u get urs answer perfectly

7) 2x=18

x=9

9+y=14

y=5

or

225=5+(n-1)10

225/5=(n-1)10

45=10n-10

35=10n

n=3.5