Answer:
Step-by-step explanation: You need to find a the lowest number that the denominators can be timed by. In you're case. You can just times 5 by 2 = 10
So that both the denominators are 10. And the denominator that was once 5. The numerator of that fraction also needs to be timed by 2.
So then you have 7 18/10 - 6 15/10
Then you can convert them to to proper fractions 8 8/10 - 7 5/10
Then you can take away the fractions so it's
8 8/10 - 7 5/10 = 1 3/10
Answer:
x - m/q = t
x = m/q + t is the answer
Answer:
25
Step-by-step explanation:
Sqrt 25 = 5
5^2 = 25
First you had subtract by ten from both sides of equation form.

Then simplify by equation.

Final answer: 
Hope this helps!
And thank you for posting your question at here on brainly, and have a great day.
-Charlie
3.9 x 10 ^-5 is the answer. 0.000039 in scientific notation is 3.9 x 10^-5