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Aleks [24]
4 years ago
6

Could you help me figure out this problem? 9-[12+(15-3)]

Mathematics
2 answers:
sladkih [1.3K]4 years ago
8 0
By doing pemdas , you would minus 3 from 15 that would be 12 then you add 12 plus 12 which is 24 then you minus 24-9 which would be 15
shtirl [24]4 years ago
7 0
The answer should be -15. happy learning!
-mathgurl
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(9c2−3cw−6w2)−(−9c2+9cw−w2)
denis23 [38]

Answer: The answer is 18c^{2}-12cw-5w^{2}

Step-by-step explanation:

The first thing you want to do is to add the 9c^{2} to the other one. You add instead of subtracting because the second one has a minus sign, and there is a minus sign in front of the parentheses. Two minus' make a plus. Adding these two together gives you a sum of 18c^{2}.

Next, you want to simplify 9cw. Remember that since 9cw is positive, and there is a minus sign if front of the parentheses, you need to subtract here. Subtracting 3cw and 9cw gives you a difference of -12cw. The new equation is 18c^{2}-12cw.

Finally, we need to combine -w2 with -6w2. Remember that -w2 has a minus sign in front of it, so you need to add w2 to -6w2. This gives you -5c^{2}. You combine this answer with the two answers above, and you get: 18c^{2}-12cw-5w^{2}. I hope this helps.

4 0
3 years ago
What is the unit rate in words?
alexgriva [62]
When rates are expressed as a quantity of 1, such as 2 feet per second<span> or </span>5 miles per hour<span>, they are called unit rates. If you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.</span>
4 0
4 years ago
URGENT A virus is spreading by a factor of 2 every hour from 1:00 p.m. to 11:00 p.m. The function below shows the number of vira
Mars2501 [29]

Answer:

0 ≤ x ≤ 10

Step-by-step explanation:

The function representing the spread of virus is:

f(x)=20(2)^{x}

Where x represents the number of hours after 1:00 pm

So, at 1:00 pm "x" will be equal to 0. So the domain will start from x = 0

According to the given statement, the virus spreads from 1:00 pm to 11:00 pm. So, the number of hours starting from 1:00 pm and ending on 11:00 pm will be the Domain. 11:00 pm means 10 hours after 1:00 pm i.e. x = 10

So, the domains starts at x = 0 and ends at x = 10. Therefore, the correct answer is 0 ≤ x ≤ 10

7 0
3 years ago
Read 2 more answers
Dascha earned $82,000 last year. This year, she is getting a cost of living increase of 2.5% of her wages. What will her wages b
Hoochie [10]

Answer:

I think her wages this year is 84,050

3 0
4 years ago
Read 2 more answers
The ratio of the number of dolls Jacky had to the number of dolls Peter had was 5 : 2 but, after Jacky gave 15 dolls to Peter, t
tester [92]

Answer:

35 [$]

Step-by-step explanation:

1) if Peter's sum is p and Jacky's is j, then the ratio 5:2 in the condition can be written j/p=5/2;

2) the phrase 'after Jacky gave 15 dolls to Peter, they have an equal number of dolls' can be written as j-15=p;

3) using the two above it is possible to make up the system of two equations:

\left \{ {{\frac{j}{p} =5/2} \atop {j-15=p}} \right. \ = > \ \left \{ {{j=2.5p} \atop {j-15=p}} \right. \ = > \ \left \{ {{j=25} \atop {p=10}} \right.

4) finally, the have together 10+25=35 doll-s.

8 0
2 years ago
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