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2 years ago

A group of students organized a car wash to raise

Mathematics

2 answers:

irinina [24]2 years ago

4 0

Answer:

I think they would earn $40 buckeroos in 8 hours

Step-by-step explanation:

$5.00 x 8 hours = $40.00

I hope this was right & helpful ^w^

Reil [10]2 years ago

3 0

Answer:

Answer is 160.00

Step-by-step explanation:

*proportion*

3hours/12cars

8hours/ (x) cars

X=32

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The managers of 21 supermarkets counted the number of cars in their parking lots on the same day. The results are shown in the l

mixer [17]

The IQR is 42.5

Step-by-step explanation:

Interquartile range is the difference of third and first quartile.

First of all we have to find the median for that purpose the data has to be arranged in ascending order. The data is already in ascending order.

As the number of values are odd

n=21

The median will be: $(\frac{n+1}{2}) th\ term$

Putting n=21

$(\frac{21+1}{2})th\ term\\=(\frac{22}{2})th\ term\\= 11th\ term$

The 11th term is 133

So median = 133

Now the data is divided into two halves

One is: 98, 100, 101, 102, 108, 109, 111,118, 129, 132

2nd is: 135, 135, 145, 146, 146, 156, 170 176, 180, 180

Q1 will be the median of first half and Q3 will be the median of 2nd half.

As now the halves contain even number of values, the medians will be the average of middle two values

For First Half:

98, 100, 101, 102, 108, 109, 111,118, 129, 132

$Q_1 = \frac{108+109}{2}\\Q_1 = \frac{217}{2}\\Q_1 = 108.5$

For Second Half:

135, 135, 145, 146, 146, 156, 170 176, 180, 180

$Q_2 = \frac{146+156}{2}\\Q_2 = \frac{302}{2}\\Q_2 = 151$

Now

Interquartile Range:

$IQR = Q_3-Q_1\\= 151-108.5\\=42.5$

Hence,

The IQR is 42.5

Keywords: Median, IQR

Learn more about median at:

#LearnwithBrianly

7 0

3 years ago

Solve for x: 2/3+1/3x=2x

igomit [66]

2/3+1/3x=2x
2+1x=6x
x-6x=-2
-5x=-2
x=2/5

4 0

3 years ago

You want to distribute 7 candies to 4 kids. If every kid must receive at least one candy, in how many ways can you do this?

Sergeeva-Olga [200]

Answer:

Step-by-step explanation:

Once you give 1 candy to each of the 4 kids, you will have 3 remaining. The number of ways those can be distributed to 4 kids is given by ...

(n+k-1)C(n)

where n is the number of candies, and k is the number of kids. "aCb" is the number of ways a can be taken b at a time:

aCb = a!/(b!(a-b)!)

For n=3 and k=4, this is ...

(3+4-1)C(3) = 6C3 = 6!/(3!·3!) = 20

There are 20 ways to distribute 7 candies to 4 kids so that each kid receives at least one.

5 0

3 years ago

How do I solve and find x?

Sphinxa [80]

Answer:

x = 76.5

Step-by-step explanation:

$\frac{x}{4.5}$ = 22 - 5

$\frac{x}{4.5}$ = 17

x = 17 x 4.5

x = 76.5

5 0

2 years ago

A soccer ball is kicked into the air, and its path can be modeled with a quadratic function. The table shows the time, t, in sec

yaroslaw [1]

The y-intercepts are
(0,0) and (5,0)
The equation of the quadratic function is
f(t) = at(t-5)
Solving for a
12 = a(3)(3-5)
a = -2
The equation of the quadractic function is
f(t) = -2t(t -5)
f(t) = -2t² + 10t

3 0

3 years ago

Read 2 more answers