Answer: D. 2.8
Explanation:
7.7 + d = 10.5
Plug 2.8 as d in the equation
7.7 + 2.8 = 10.5
This is a true statement so D is the correct answer!
Answer:
48 minutes
Step-by-step explanation:



It will take 48 more minutes to finish raking the backyard.
From the given problem, it says show how to make a ten to solve 13-7.
Subtracting 13 to 7 gets 6. In order to get a 10, subtract 10 by 6. 10-6 = 4.
So, you need to add 4 in order to make a ten.
Disclaimer: What do you by make a ten to solve 13-7?