I think it might be six, sorry if its wrong, but I hope its right!!
Hope this helps!!!!
love: Deku <3
Answer: 37
Step-by-step explanation:
Hello :
4√2-7√2= (4-7)√2 = -3√2
Answer:

Step-by-step explanation:
We know that for principal amount P , time period T and rate of interest
, simple interest is given by
.
Here ,

To find : simple interest rate i.e., 
On putting values of
in formula , we get 

Now we need to round off the answer to the nearest tenth .
So, simple interest rate is % =
=
9/10 is the answer. 7/8 is 70/80 and 9/10 is 72/80