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Makovka662 [10]
3 years ago
12

What is 4 copies of 1/5

Mathematics
1 answer:
GarryVolchara [31]3 years ago
6 0

Answer:

1/5 + 1/5 + 1/5 + 1/5 = 4/5

Step-by-step explanation:

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Suppose you have a mean standardized score of 1200 points with a standard deviation of 200 points. This data is normally distrib
Keith_Richards [23]
The score is given by:
z=(x-mean)/s.d
In the question above:
x=1300
mean=1200
s.d=200
Thus:
z=(1300-1200)/200
=100/200
=0.5
The answer is 0.5
5 0
3 years ago
Help!<br><br>What is the slope of the line represented by -3y=4x+18?
Vika [28.1K]
Its y = -4/3x -6
so-4/3 is slope
4 0
2 years ago
an inlet pipe and a hose together can fill the pond in 10 hours. The inlet pipe alone can complete the job in one hour less time
Annette [7]

Answer:

The hose pipe can fill the pond in 21.465 hours.

The inlet pipe can fill the pond in 20.465 hours.

Step-by-step explanation:

Given that, a inlet pipe and a hose pipe together can fill the pond in 10 hours.

The inlet pipe alone can fill the pond in one hour less time than the hose pipe can  fill the pond.

Let the hose pipe can complete the job in x hours.

Then the inlet pipe can fill the pond in (x-1) hours.

The rate of filling of hose pipe is =\frac{1}{x}

The rate of filling of inlet pipe is =\frac{1}{x-1}

The rate of filling of both pipes is = \frac 1{10}

According to the problem,

\frac{1}{x}+\frac{1}{x-1}=\frac{1}{10}

\Rightarrow \frac{x-1+x}{x(x-1)}=\frac1{10}                              [ simplifying the fraction]

\Rightarrow \frac{2x-1}{x^2-x}=\frac1{10}                            

\Rightarrow 10(2x-1)= x^2-x                [ Multiplying 10(x²-x) both sides]

\Rightarrow x^2-x= 20x-10

\Rightarrow x^2-x-20x+10=0             [ simplifying ]

\Rightarrow x^2-21x+10=0

\Rightarrow x=\frac{-(-21)\pm\sqrt{(-21)^2-4.1.10}}{2.1}       [ applying quadratic formula]

\Rightarrow x=\frac{21\pm21.93}{2.1}

⇒ x= 21.465,  -0.465

x= - 0.465 does not possible, since time can not be negative.

∴x=21.465

The hose pipe can fill the pond in 21.465 hours.

The inlet pipe can fill the pond in (21.465-1)=20.465 hours.

3 0
3 years ago
A car salesman earns a base salary plus commission for every car he sells. The expression shows the amount the salesperson earns
nataly862011 [7]
$2,000, the commission is like a bonus if the car salesman sells cars, so per month is 2,000 if he sold 8 cars it would be 8,000 and plus the earning per month it would be $10,000.

4 0
3 years ago
Read 2 more answers
Which is the GCF of 36 and 90?
Travka [436]

Answer:

The GCF of 36 and 90 is 18

3 0
3 years ago
Read 2 more answers
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