Answer:

Step-by-step explanation:
y-0.8x=0.5
y*10-0.8x*10=0.5*10
10y-8x=5
10y-8x+8x=5+8x
10y/10=5/10+8x/10
y=5+8x/10
5*5+8x/10-2.5
8x+5/2-2.5=4x
y=5+8x/10, x=x
Multiply each side by 5
v = 45
Answer: 8x+10y
Step-by-step explanation:
2(4x)= 8x
2(5y)= 10y
8x+10y
The distributive property will show you how you can state the arrays.
1) Make 135 = 100 + 35
⇒ 135 ÷ 5 = (100 + 35 ) ÷ 5
Distributive property → 100 ÷ 5 + 35 ÷ 5 =
⇒ 20 + 7 = 27
This means that 27 is the result of the division 135 ÷ 35
Then you can make one array with 20 rows of 5 tiles each, and 7 rows of 5 tiles each.
2) For the second array you can make 135 = 50 + 50 + 30 + 5
⇒ 135 ÷ 5 = (50 + 50 + 30 + 5) ÷ 5
Distributive property → 50 ÷ 5 + 50 ÷ 5 + 30 ÷ 5 + 5 ÷ 5
⇒ 10 + 10 + 6 + 1 = 27
Which also shows that 27 is the result of 135 ÷ 5
Therefore, you can make an array with 10 rows plus 10 rows, plus 6 rows, plus 1 row, each of 5 tiles.