Answer:
1. 1+(2+3)
2. (1 +2)+3
3. (2*3)*4
4. 2*(3*4)
5. 3*2
6. 2+1
7. 2(x+3)
8. 4x+3
9. (4*3)+(4*2)
10. (-2*5)+(-2*x)
11. (3*10)-(3*y)
12. (-3*4)-(-3*x)
13. commutative property
14. commutative property
15. distributive property
16. associative property
17. 1+(-3)
18. 4+3
19. -(-4-3)
20. -4+3
Hope this helps
The answer for your question is a). Because if you add 12.6 pounds by 16.7 pounds you will get 29.3 as your answer.the estimated answer is 30 and,22.1 estimated is 22.Finally,you just subtract 30 by 22 and you get your answer as 8.
Answer:

Step-by-step explanation:
We have the following function
y = 12^x, and we need to find the inverse function.
To find the inverse function we should solve the equation for "x". To do so, first, we need to:
1. Take the logarithm in both sides of the equation:
lg_12 (y) = log _12 (12^x)
(Please read lg_12 as: "Logarithm with base 12")
From property of logarithm, we know that lg (a^b) = b*log(a)
Then:
lg_12 (y) = x*log _12 (12)
We also know that log _12 (12) = 1
Then:
x = log_12(y).
Then, the inverse of: y= 12^x is:

Let's make an equation where x is the number of gallons and y will be the overall price.
2.5x=y; since it is $2.52 PER gallon, you need to multiply the amount of gallons by the cost. In this case, it is 4.
2.5(4)=10
So, the price of 4 gallons is $10.