Question

QT 1.

Answer 1

Here's the work:

1. (6 x 5) + (14 x 8) = 142
142/20 = 7.1

2. (8 x 6) + (12 x 9) = 156 
156/20 = 7.8

3. (86 x .8) + (93 x .2) = 87.4

4. (0.1 x 0.85) + (0.4 x 0.7) + (0.5 x 0.75) = 74%

5. (8 x 0.5) + (5 x 0.2) + (8 x 0.3) = 7.4

Sorry this took so long!

Answer 2

#1 7.1 years old
#2 7.8 years old
#3 87.4
#4 74
#5 7.4