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3 years ago

The table shows the time 50 students spent on their homework.

Mathematics

1 answer:

seraphim [82]3 years ago

8 0

Answer: Mean = 52.8 mins

Step-by-step explanation:

We have lapses of 30 minutes, so we can write the average for each, this means that:

0 < t < 30 can be averaged to the middle of the range: 15 min.

Doing this, we have that:

7 students 15 min

27 students 45 min

12 students 75 min

4 students 105 min.

Now we can calculate the mean:

mean = (x1*n1 + x2*n2 + ...)/N

where x1 is the amount of time 1, and n1 is the number of students associated to that time and so on. N is the total number of students

Mean = (7*15min + 27*45min + 12*75min + 4*105min)/(7 + 27 + 12 + 4)

Mean = 52.8 mins

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If there are tickets sold to children for $5 and $12 to adults, and there are only 400 tickets sold for $3925 then how many chil

Sever21 [200]

125 children tickets were sold

<u>Solution</u>:

Given that

Price of 1 ticket sold to children = $5

Price of 1 ticket sold to adult = $12

Total number of ticket sold = 400

Amount generated by selling 400 tickets = $3925.

Need to calculate number of ticket sold to children’s

Let’s assume number of tickets sold to childrens = x

So number of tickets sold to adults = 400 – x

Amount generated from x ticket sold to children $=x \times \text { Price of } 1 \text { ticket sold to children }$

$x \times 5=5 x$

Amount generated from (400 – x) tickets sold to adults $=x \times \text { Price of } 1 \text { ticket sold to adult }$

$=(400-x) \times 12=4800-12 \mathrm{x}$

<em>Total amount generated from 400 tickets = Amount generated from children’s tickets + Amount generated from adults ticket </em>

= 5x + (4800 – 12x) = 4800 -7x

As given that amount generated = 3965

=> 3965 = 4800 – 7x

Solving above expression to get value of x, we get

7x = 4800 - 3965

=> 7x = 875

=> x = 125.

Hence number of children tickets sold = 125.

4 0

3 years ago

Shaun's tent (shown below) is a triangular prism. Find the surface area, including the floor, of his tent.

liq [111]

Answer:

the answer is 4

6 0

3 years ago

Andrea has just created a scale drawing of her bedroom room which is 18 feet long by 12 feet wide. The scale drawing shows the l

dalvyx [7]

The width of scale drawing is 4 inches

Step-by-step explanation:

The length of room =L1= 18 ft

The width of room =W1= 12 ft

The scale drawing length=L2 = 6 inches

The scale drawing width W2= x

According to rule of three

$\frac{L1}{L2} = \frac{W1}{W2}$

putting values in equation we get

$\frac{18}{6} = \frac{12}{x}$

$3=\frac{12}{x}$

Re-arranging the equation we get

$x=\frac{12}{3} \\x= 4$

So the width of scale drawing is 4 inches

Keywords: Algebra

Learn more about algebra at:

#learnwithBrainly

6 0

3 years ago

Please answer!!! I’m stuck on it and need help fast <3

asambeis [7]

Answer: 2880

Explanation: First, multiply 40 and 4 together to find the value of h. This should get you to 160. Then plug in 160 into h in the equation e=18h. This multiplies 18 and 160 together. You will then get an answer of 2880.

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3 years ago

The ratio of passenger cars to cargo cars in

KonstantinChe [14]

44 cars

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2 years ago