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Wewaii [24]
3 years ago
9

How many km per hour must you swim if you want to cross a 5km channel in 7 hours

Mathematics
1 answer:
astra-53 [7]3 years ago
5 0
v=\dfrac{s}{t}=\dfrac{5}{7}\;[\dfrac{km}{h}]

Answer: You must swim 5/7 km per hour to cross a 5km channel in 7 hours.
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To convert 25 minutes to hours, you would use the ratio 1hour/60minutes?
Talja [164]
Idk but it's 0.416667

cuz 25/60 equals so
7 0
3 years ago
Show all your work to receive full credit for this problem. Solve the system of equations using the elimination method. 2a + 3b
Sindrei [870]

Given equations are;<span>
2a + 3b = -1   ..................equation 1
3a + 5b = -2  ....................equation 2</span>

Now multiply equation 1 with (-3)

The equation will be;

-6a -9b = 3 …………………..equation 3

Now multiply equation 2 with (2)

The equation will be;

6a + 10b = -4 ……………..equation 4

Now add equation 3 and equation 4

-6a – 9b = 3

<span>6a  + 10b = -4</span>

<span>------------------------------</span>

0a + b = -1

b = -1

Now put the value of b in equation 1

2a + 3(-1) = -1

2a -3 = -1

2a = -1+3

2a = 2

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Thus the solution is (a,b) = (1,-1)

<span>
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8 0
3 years ago
Give me an example of an irrational number that is greater than 10
Pavel [41]

To find:

An irrational number that is greater than 10.

Solution:

Irritation number: It cannot be expression in the form of \dfrac{p}{q}, where, q\neq 0, p,q are integers.

For example: \sqrt{2}\sqrt{3},\pi, 1.263689...,etc..

We know that square of 10 is 100. So, square root of any prime number is  an example of an irrational number that is greater than 10.

First prime number after 100 is 101.

Required irrational number =\sqrt{101}

Therefore, \sqrt{101} is an irrational number that is greater than 10.

5 0
3 years ago
Maya is helping a gardener plant 300 bulbs. They plant 20% of the bulbs on Monday and 30% of the bulbs on Tuesday. Maya says thi
Katyanochek1 [597]

Answer:

because the total is 300 not 100 so 50 is not reasonable because that is the percentage they planted and since it is more than 100 then it should be a percent of 300 not 100. Maya is wrong about placing 50 bulbs instead they placed 150.

Step-by-step explanation:

8 0
3 years ago
Evaluate the formula v=bh/3 for b = 36 in.2 and h = 11 in.
Over [174]
V=36times 11/3
v=132
4 0
4 years ago
Read 2 more answers
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