Try A
I think this is right
Hope this helps you :)
Step-by-step explanation:

So sqrt(40) lies between 6 and 7.
Answer:
I think it would be 
Step-by-step explanation:
stomp me if its wrong <3

<em> hopefully this helps ~</em>
Explanation:
See answer for explanation.
Answer:
5x-3+2x=x+7+6x
Answer: There are no solutions.
I'm pretty sure this is correct, sorry if it's not.
Have a lovely evening!
Answer:
$2.57
Step-by-step explanation:
divide 5,140 by 20,
5,140/20=257=2.57