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Ierofanga [76]
4 years ago
5

A class of 30 swim team members took a lifesaving test. Eighteen of the members had an average score of 92. The remaining member

s had an average score of 84. What was the average for the entire swim team?
Mathematics
2 answers:
m_a_m_a [10]4 years ago
6 0
The average is 88.8%
Amiraneli [1.4K]4 years ago
3 0
The answer is 88.8% how i got it is by:

30-18= 12 which is the number of member that had an average of 84
then multiply  12 times 84 = 1008 (keep this number)

last you multiply 18 by 92 which equals 1656 

add 1008 and 1656 together  and get 2664.

divide 2664 / 30 and you get the average of 88.8
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The fabric cost 7cents per square inch. She will only pay for the fabric used to cover the box, even if there is waste or extra.
DIA [1.3K]

Answer:

Shyla will pay about 63 cents to cover the box

Step-by-step explanation:

Length of the box ( l ) = 7 inches

Width of the box (b) = 11 inches

Height of the box (h) = 8 inches

<em></em>

<em>We can solve this equation by following two simple steps.</em>

1. The first step is to find the total surface area of the box. This is the total area that the decorative fabric will be covering.

We can get this by the following formula:

SA=2( length X width) +2( length X height )+2(height X width)

SA = 2( 7 X 11 ) + 2(7 X 8) + 2 (8 X 11 ) = 442 square inches

2. The second step is to divide the total surface area by the price of the fabric per square inch.

This will be 442 square inches divided by 7 cents per square inch  = 63.14 cents

Shyla will pay about 63 cents to cover the box

4 0
3 years ago
3. What % of 100 is 13?
Sedbober [7]

Answer:

To get the solution, we are looking for, we need to point out what we know.

1. We assume, that the number 13 is 100% - because it's the output value of the task.

2. We assume, that x is the value we are looking for.

3. If 13 is 100%, so we can write it down as 13=100%.

4. We know, that x is 100% of the output value, so we can write it down as x=100%.

5. Now we have two simple equations:

1) 13=100%

2) x=100%

where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:

13/x=100%/100%

6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for what is 100% of 13

13/x=100/100

(13/x)*x=(100/100)*x       - we multiply both sides of the equation by x

13=1*x       - we divide both sides of the equation by (1) to get x

13/1=x

13=x

x=13

now we have:

100% of 13=13

Step-by-step explanation:

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