Knowing 1+7 helps you find the sum of 7+1 because 1+7 and 7+1 is communitive property of addition. Also because 1+7 is the same answer as 7+1.
Ex:
1+7=8
And
7+1=8
its the same result.
in mix number, the answer will be

if you need in decimal form than the answer in going to be

Answer: a
Step-by-step explanation:
<span>x-intercept y = 0 then
2x = 12
x = 6</span>
8-4 = 4, 4÷2=2 answer is 2