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3 years ago

Find the sum. (-7/2z+4)+(1/5z-15)

Mathematics

1 answer:

Dafna11 [192]3 years ago

7 0

Answer:

-(33+110z)/10z

Step-by-step explanation:

(-7/2z +4)+(1/5z -15)

from BODMAS, solving the one in the bracket

First(-7/2z +4)+(1/5z -15)

Find the Lcm

[-7/2z +4] +[1/5z -15]

(7+8z)/2z +(1-75z)/5z

find the Lcm which is 10z

[5(-7+8z) + 2(1-75z)]/10z

[(-35+40z)+(2-150z)]10z

(-35+2+40z-150z)/10z

(-33-110z)/10z

-(33+110z)/10z

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2 years ago

A sector with a radius of 15 cm has a central angle measure of 8pie/5

Citrus2011 [14]

Answer:

The area of the sector is $180\pi \ cm^2$ .

Step-by-step explanation:

We have,

Radius of circle is 15 cm

Central angle is $\dfrac{8\pi}{5}\ \text{radian}$

It is required to find the area of the sector. The formula used to find the area of sector is given by :

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2 years ago

In a typical children's soccer game, there is one goal scored approximately every 18 minutes. The number of goals scored follows

Alja [10]

Answer:

2.24

Step-by-step explanation:

The probability formula using a Poisson distribution is:

$P(k\ events) = \frac{\lambda^{k}e^{-\lambda}}{k!} \\\lambda\ is\ the\ average\ number\ of\ events\ per\ interval \\e\ is\ euler's\ number \\k\ is\ the\ number\ of\ events\ you\ want\ to\ calculate$

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So if for example you were interested in the probability of making 2 goals in a game

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$P(k = 2) = \frac{5^{2}e^{-5}}{2!} = 0.084$

This was just an example,

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3 years ago

Solve for the value of x ? −2(x+13)+9x=4

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Answer:

30/7

Step-by-step explanation:

Distribute:

-2x-26+9x=4

Combine like terms:

7x-26=4

Add 26.

7x=30

Divide by 7:

x=30/7.

Hope this helps :D

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irina1246 [14]

Answer:

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2 years ago

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