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lions [1.4K]
3 years ago
5

Delsym middle school has 1,800 students. A random simple of 80 shows that 24 have cell phones. Predict the number of students in

the school who have cell phones
Mathematics
1 answer:
Paul [167]3 years ago
7 0
Cross multiply and set it up like this.

1800 X
------- • -------
80 24

Multiply 1800•24
Then divide by 80 and you get 540.
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Ahmad’s father is 4 times as old as Ahmad. After 5 years, father will be three times as old as Ahmad. Find their present ages
Ilia_Sergeevich [38]

The present age of Ahmed and Ahmed's father is 12 and 36 respectively.

Step-by-step explanation:

Given : Ahmed's father is thrice as old as Ahmed. After 12 years, his age will be twice that of his son.

To Find : Their present age ?

Solution :

Let the Ahmed's age be 'x'.

Ahmed's father is thrice as old as Ahmed.

i.e. Ahmed's father age is '3x'

After 12 years, his age will be twice that of his son.

i.e. 3x+12 = 2(x+12)3x+12=2(x+12)

Solving the equation,

3x+12 = 2x+243x+12=2x+24

x=12x=12

So, Ahmed's age is 12.

Ahmed's father age is 3\times 12=363×12=36

Therefore, The present age of Ahmed and Ahmed's father is 12 and 36 respectively.

<h2>There is 3 times in space of 4 times please mark as brainlist</h2>
7 0
3 years ago
Eliot needs to replace a window that is in the shape of a semicircle.
USPshnik [31]

Answer:

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Step-by-step explanation:

6 0
3 years ago
A school purchases boxes of candy bars.
Cloud [144]

Answer:

$0.20 per candy bar

Step-by-step explanation:

There are 50 candy bars per box. It's costing the school $30/50=$0.60 per candy bar to buy. The school sells each candy bar for $0.80, making a profit of $0.20 per candy bar.

3 0
3 years ago
According to data, as education level increases the unemployment rate decreases. This is an example of
Crank
I don’t think I just want points
5 0
3 years ago
What is the difference between a proper and an improper subset?
lutik1710 [3]

A proper subset describes the set in full.  An improper subset strays from the original set.

4 0
3 years ago
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