I don’t understand this question

They are asking you to subtrack 9/10 from 1 2/5.

You can achieve this by finding a common denominator for these 2 fractions and then subtracting it.

So, we know that the common denominator is 10 because 5*2=10.

We then change the fraction to 1 4/10.

Then you subtract 9/10 from 1 4/10

1 4/10 can be rewritten as 14/10.

14/10 - 9/10 = 5/10 = 1/2

Step-by-step explanation:

3x + 18 = 147°

step-by-step explanation:

3x + 18 = 147°, because the value of the central angle is equal to the value of the arc formed by it.

i hope i you.