Answer with Step-by-step explanation:
Let one ⊕ represents fifteens.
Mathematically, we assume that
x represents fifteens
So, our equation becomes,

Model can be represented as :
7×⊕ + 15 ×⊕
=⊕⊕⊕⊕⊕⊕⊕ + ⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕
=⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕
Answer:
7 57/80
Work:
7.7125= 7.7125/1
7.7125/1 * 10000/10000= 77125/10000
GCF=125
77125/125 / 10000/125 =617/80
=7 57/80
Answer:
c - 8.9
Step-by-step explanation:
2.3^2+ 8.6^2
✓79.25
8.9