Answer:
3 packs
Step-by-step explanation:
1 pack = $3
To see how many she could buy divide the money she has by how much each pack costs
9/3 = 3
$3 for each pack is the same as
3+3+3 = 6+3 = 9
The most efficient way to solve this problem is isolating the y in the first equation because:
6x + 3y = 27
3y = 27 - 6x
y = 9 - 2x
Since all the numbers have a common factor of 3, it can be easily simplified/reduce.
If you used any other variable, you would have gotten a fraction.
Now that you found y, you can substitute it into the other equation to solve for x.
ANYWAYS, your answer is A
Answer:
8.6
Step-by-step explanation:
18.8998/2.2 = 8.590818181...
Since 2.2 has 2 significant digits, the answer has to have 2 significant digits.
Answer: 8.6
I would say all of them except for the equal sign
5^-3 = 1/125
-5^-3 = -1/125
(-5^-3)^-1 = -125
(-5^-3)^0 = 1
