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Reil [10]
3 years ago
10

Pls help me on #8 pls i will mark brainliest

Mathematics
2 answers:
Over [174]3 years ago
8 0

Answer:

a.20

b. 25 to 5

Step-by-step explanation:

to find one sixth, divide 30 by 6:

30/6=5

to get five sixths multiply by five:

5 times 5=25

so 25 like x, subtract 25 from 30 and you get 5, so its 25:5

and subtract 5 from 25 to get 20

hi again! pls give me brainliest btw so i can level up! i only need this one!!!!

and a thx too if u can

Andrew [12]3 years ago
3 0

Answer:

ummmm.................... whatt grade is this

Step-by-step explanation:

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A cyclist travels 5 miles each way on a bike path. Travel in one direction is with a 4 mile per hour wind and travel back is aga
Dahasolnce [82]

Answer:

a. 10v/(v² - 16) b. 3 hours

Step-by-step explanation:

a. Write and simplify an equation for the amount of time t in hours it will take the cyclist to make the trip.

Let v be the speed of the cyclist without the wind. The speed of the cyclist with the 4 mile per hour wind in the direction of the wind is v' = v + 4. Since the distance travelled is 5 miles, and time, t = distance/speed, the time it takes to make this trip is t' = 5/(v + 4)

Let v be the speed of the cyclist. The speed of the cyclist with the 4 mile per hour wind against the direction of the wind is v" = v - 4. Since the distance travelled is 5 miles, and time, t = distance/speed, the time it takes to make this trip is t" = 5/(v - 4).

So, the total travel time, T = t' + t"

= 5/(v + 4) + 5/(v - 4)

= [5(v - 4) + 5(v + 4)]/[(v + 4)(v - 4)]

= [5v - 20 + 5v + 20)]/(v² - 4²)

= 10v/(v² - 16)

b. What is the cyclist's total travel time, if she travels an average of 6 miles per hour without the wind?

If v = 6 miles per hour, then

T = 10v/(v² - 16)

= 10(6)/(6² - 16)

= 60/(36 - 16)

= 60/20

= 3 hours

3 0
2 years ago
The bottom of Ignacio's desktop is 74.5\,\text{cm}74.5cm74, point, 5, space, c, m from the floor. Ignacio sits in his adjustable
Musya8 [376]

Answer:

The inequality is:

49.3+4.8r <74.5

The solution set is r < 5.25

Step-by-step explanation:

7 0
3 years ago
How to solve 14+(5+×)2,when=-3
Nadusha1986 [10]

Answer:3//./3️⃣0️⃣

Step-by-step explanation:

5 0
3 years ago
Find the gradient of the line<br> with the equation 3x+4y=10
Simora [160]
The gradient of the line with that equation is -3/4
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3 years ago
The population of the country was 314 million. What is the empirical probability of death by stroke during a single​ year
Marat540 [252]

Answer:

Empirical probability of deaths cause by stroke=0.004086

Empirical probability of deaths cause by kidney disease =0.001436

Death rate due to stroke is 4 times the death rate due to kidney disease.

Step-by-step explanation:

Consider the table attached in figure

No. of deaths cause by stroke = 128300

No. of deaths caused due t kidney disease = 45100

Total population = 314 x 10⁵

Formula to calculate empirical probability:

P(A)=\frac{No.\, of\,\, times\,\, event\,\, occurs}{Total\,\, population}\\

Empirical probability of deaths cause by stroke:

P(A)=\frac{128300}{314\times 10^5}\\\\P(A)=0.004086

Percentage of deaths cause by stroke =0.4%

Empirical probability of deaths cause by kidney disease:

P(B)=\frac{45100}{314\times 10^5}\\\\P(B)=0.001436

Percentage of deaths cause by kidney disease =0.1%

Ratio between deaths caused to stoke to deaths caused by kidney disease is 4:1 which means death rate due to stroke is 4 times the death rate due to kidney disease.

3 0
3 years ago
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