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sashaice [31]
3 years ago
9

The ratio of sixth graders to seventh graders at the school dance is 2 to 3.

Mathematics
1 answer:
Inessa [10]3 years ago
6 0

Answer:

18

Step-by-step explanation:

2:3 x 9

18:27

18 + 27 = 45

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Trains Two trains, Train A and Train B, weigh a total of 192 tons. Train A is heavier than Train B. The
OleMash [197]

Hi there!

So we know that the two train together is a total of 192 tons and the difference of their weights is 120 tons...

Ok let think...

When we’re looking at the once place, you’ll see a two... this means that the two train both have a ending of 1 since 2 is split into 1...

That would be another clue..

Now let think again...

If it would be 151 and we subtract by 120.. we would get...

151-120=31

Well it ends with a 1 so it would be perfect but we have to see if 151 and 31 together adds up with the total of 192..

151+31=192

This means that train A could be 151 tons or 31 tons and train B can also be wither 151 tons or 31 tons...

6 0
3 years ago
Graph a line with a y-intercept of -3 and a slope of 1/2
OleMash [197]

Answer:

A

Step-by-step explanation:

(0,-3), (2,-2), (4, -1), (6,0) are on the line and (6, 0) is A

4 0
3 years ago
Each side of a cube is 4 inches long. What surface area of the cube
Georgia [21]

Answer:

96 in^2

Step-by-step explanation:

This is because u have to multiply the two bases and the lateral sides to get your area

4 0
3 years ago
Read 2 more answers
. Ramu took a loan of 50000 rupees from a bank which charges 10% interest, compounded an- nually. He repaid 10000 rupees after o
Setler79 [48]

Answer:

= 30,550 rupee owed

Step-by-step explanation:

yr1 = 50000 x 0.10^1 = 5000

5000 - 10000 = 5000 credit from debt.

yr 2 = 50000 x 1.10^2 = 500 debit from debt = 5000-15000= 10,000 credit from debt

yr 3 = 50000 x 1.10^3 = 50 debit from debt

5000 + 500 = 15000 where 50,000 owed initially and yr1 and yr 2 paid in full interest of 5500 and we deduct this from his payment = 25000-5500 =

19500 paid of initial and nothing owed on interest.

50000-19500= 30,500 rupees owed + 50 rupee interest.

= 30,550 rupee owed

4 0
2 years ago
Read 2 more answers
A survey of shoppers is planned to determine what percentage use credit cards. prior surveys suggest​ 63% of shoppers use credit
Alona [7]
We would need a sample size of 560.

We first calculate the z-score associated. with this level of confidence:
Convert 95% to a decimal:  95% = 95/100 = 0.95
Subtract from 1:  1-0.95 = 0.05
Divide by 2:  0.05/2 = 0.025
Subtract from 1:  1-0.025 = 0.975

Using a z-table (http://www.z-table.com) we see that this is associated with a z-score of 1.96.

The margin of error, ME, is given by:
ME=z*\sqrt{\frac{\hat{p}(1-\hat{p})}{n}}

We want ME to be 4%; 4% = 4/100 = 0.04.  Substituting this into our equation, as well as our proportion and z-score,
0.04=1.96\sqrt{\frac{0.63(1-0.63)}{n}}
\\
\\\text{Dividing both sides by 1.96,}
\\
\\\frac{0.04}{1.96}=\sqrt{\frac{0.63(0.37)}{n}}
\\
\\\text{Squaring both sides,}
\\
\\(\frac{0.04}{1.96})^2=\frac{0.63(0.37)}{n}
\\
\\\text{Multiplying both sides by n,}
\\
\\n(\frac{0.04}{1.96})^2=0.63(0.37)
\\
\\n(\frac{0.04}{1.96})^2=0.2331
\\
\\\text{Isolating n,}
\\
\\n=\frac{0.2331}{(\frac{0.04}{1.96})^2}=559.67\approx560
3 0
3 years ago
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