Answer: 9.7 seconds
Step-by-step explanation:

Answer:
5+5=10
5x2=10
Together, they equal 20.
Step-by-step explanation:
Answer:
sorry i dont know
Step-by-step explanation:
9514 1404 393
Answer:
-11
Step-by-step explanation:
DeYanna's cards are ...
black: 2, 4, for a total value of 2+4 = 6
red: 7, 10, for a total value of -(7+10) = -17
Then the total value of DeYanna's cards is ...
6-17 = -11