<u>By substitution method </u>
5x - 3y =1
3x + 2y = 1
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I hope I helped you^_^
Answers:
a) 4/5
b) 1/5
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Let's say you start off with $100. If you spend 3/4 of that, then you spend 75 dollars (because 75/100 = 3/4). Think of it like 75 cents = 3 quarters. If you spend 75 dollars out of 100 total, then you have 100-75 = 25 dollars left after the first round of spending.
If you spend 1/5th of what is left, then you spend $5 on the second round leaving 25-5 = 20 dollars left at the end of the day.
Total up what you spend for both rounds: 75+5 = 80, which divides over the original amount 100 to get 80/100 = 8/10 = 4/5
If you had 20 dollars at he end of the day, out of 100 initially, then 20/100 = 2/10 = 1/5 is the fraction of what you have left.
note how 4/5 and 1/5 add to 5/5 = 1.00 = 100%. This is because the amount you spend and the amount you have left over must add to 100% of all the money you started with
8 - 15 means subtract the positive number 15 from 8.
8 - 15 = 8 + (-15) = -7
8 - (-15) means subtract the negative number -15 from 8.
Subtracting a negative number is the same as adding a positive number.
8 - (-15) = 8 + 15 = 23
8 - 15 = -7, and 8 - (-15) = 23. The expressions mean different operations and have different answers.
Answer:
16 times out of 64
Step-by-step explanation:
So, I could be wrong, but basically:
9, 10, and 11 are only 3 of the 12 possible outcomes that could happen.
3 out of 12 is 1/4.
What this means is that for every 4 times he spins the pointer, he can expect to get 9, 10, or 10 once.
Or 25% of the time
1/4 of 64 is 16.
First add the times she went over the the 3 months
So she went 6 monthsin total
Multiply that by 10 so equals 60
Alison will take 60 bags of cans to the recycling center in these three months.
Hope I helped
