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3 years ago

Please help me solve this

Mathematics

2 answers:

topjm [15]3 years ago

6 0

The answer is 4
6/2 x 6/2 = 36/4 = 9
15x2/1+5 = 30/6 = 5
9-5=4

Brilliant_brown [7]3 years ago

4 0

Answer:

the answer will be something like 18

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6(x+2)=5(x+7) please help me is urgent

Elenna [48]

Answer:

x=23

Step-by-step explanation:

6(x+2)=5(x+7)

6x+12=5x+35

6x-5x=35-12

x=23

8 0

3 years ago

I WILL MARK BRAINLIEST! PLS HELP!At an ice-breaker event, ten people are randomly assigned to seats at a round table. Patrick an

Sergio039 [100]

Answer:

$\frac{8}{10}$

if you need it simplified then

$\frac{4}{5}$

Step-by-step explanation:

10 people then theres 10 seats, that'll be the total.

2 people and 2 seats.

10-2= 8

so that will make

$\frac{8}{10}$

8 0

3 years ago

2n+3n+7=-41. how do you solve number 1?

Sidana [21]

Combine like terms 2n+3n= 5n, then you subtract 7 from both sides and get 5n=-48 -48/5= -9.6

6 0

3 years ago

A sample of blood pressure measurements is taken for a group of adults, and those values (mm Hg) are listed below. The values

mamaluj [8]

Answer:

Systolic variation coefficient (CVS) = 0.1446 = 14.46%

Diastolic variation coefficient (CVD) = 0.1789 = 17.89%

The variation, with respect to the mean, of the systolic pressure sample is slightly less than the variation of the Diastolic pressures.

Step-by-step explanation:

Systolic Mean (MS) = 127.8

Diastolic Mean (MD) = 73.5

Standard Deviation Systolic (sdS) = 18,486

Standard Deviation Diastolic (sdD) = 13.1508

The coefficient of variation is defined by:

Systolic variation coefficient (CVS) = sdS / MS = 18.486 / 127.8 = 0.1446 = 14.46%

Diastolic variation coefficient (CVD) = sdD / MD = 13.1508 / 73.5 = 0.1789 = 17.89%

Then, it can be concluded that the variation, with respect to the mean, of the systolic pressure sample is slightly less than the variation of the Diastolic pressures.

8 0

3 years ago

A population of bacteria is growing exponentially. At 7:00 a.m. the mass of the population is 12 mg. Five hours later it is 14 m

sergejj [24]

Answer with Step-by-step explanation:

The exponential growth function is given by

$N(t)=N_oe^{mt}$

where

$N(t)$ is the population of the bacteria at any time 't'

$N_o$ is the population of the bacteria at any time 't = 0'

'm' is a constant and 't' is time after 7.00 a.m in hours

Assuming we start our measurement at 7.00 a.m as reference time t = 0

Thus we get $N(0)=N_oe^{m\times 0}\\\\12=N_o$

Now since it is given after 5 hours the population becomes 14 mg thus from the above relation we get

$12\times e^{m\times 5}=14\\\\e^{5m}=\frac{14}{12}\\\\m=\frac{1}{5}\cdot ln(\frac{14}{12})\\\\m=0.031$

Thus the population of bacteria at any time 't' is given by

$N(t)=12e^{0.031t}$

Part a)

Population of bacteria after another 5 hours equals the population after 10 hours from start

$N(10)=12e^{0.031\times 10}=16.361mg$

Part b)

Population of bacteria at 7:00 p.m is mass after 12 hours

$N(1)=12e^{0.031\times 12}=17.41mg$

Part c)

Population of bacteria at 8:00 p.m is mass after 1 hour

$N(1)=12e^{0.031\times 1}=12.3378mg$

Part d)

Differentiating the relation of population with respect to time we get

$N'(t)=\frac{d(12\cdot e^{0.031t})}{dt}\\\\N'(t)=12\times 0.031=0.372e^{0.031t}$

Thus we can see that the percentage increase varies with time initially the percentage increase is 37.2% but this percentage increase increases with increase in time

Part 4)

Since there are 24 hours in 1 day thus the percentage increase in the population is

$\frac{N(24)-N_o}{N_o}\times 100\\\\=\frac{25.25-12}{12}\times 100=110.42$

Thus there is an increase of 110.42% in the population each day.

7 0

4 years ago