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Angelina_Jolie [31]
3 years ago
6

Perform the indicated operation. Be sure the answer is reduced.

Mathematics
1 answer:
Morgarella [4.7K]3 years ago
8 0
The answer is: k^{2} /2

 The explanation is shown below:
 1. You have the following expression given in the exercise above:
 ( 4k^{2}) /(2k+3)(2 k^{2} -5k-12)/(8k-32)

 2. By applying the distributive property, you obtain:
 (8k^{4}-20k^{3}-48k)/(16k^{2} -40k-96)
 3. Now, you must factor k^{2} in the numerator and 2
 in the denominator:
 k^{2}(8 k^{2} -20k-48)/2(8 k^{2} -20k-48) 
 4. Simplify:
 k^{2} /2
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Step-by-step explanation:

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A boat crew rowed 10.5 miles downstream, with the current, in 1.5 hours. the return trip upstream , against the current , covere
alukav5142 [94]

Answer:

The speed of the boat is 5 miles per hours

The speed of the current is 2 miles per hours .

Step-by-step explanation:

Given as :

The distance cover by boat downstream = D = 10.5 miles

The time taken by boat to cover D distance = T = 1.5 hours

The distance cover by boat Upstream = d = 10.5 miles

The time taken by boat to cover d distance = t = 3.5 hours

Let The speed of boat =  x mph

Let The speed of current =  mph

Now, According to question

∵ Speed = \dfrac{Distance}{Time}

<u>For Downstream</u>

x + y = \dfrac{D}{T}

Or, x + y =  \dfrac{10.5}{1.5}

Or, x + y = 7          .......A

<u>For Upstream</u>

x - y = \dfrac{d}{t}

Or, x - y =  \dfrac{10.5}{3.5}

Or, x - y = 3          .......B

Now, Solving eq A and eq B

So, (x + y) + (x - y) = 7 + 3

Or, (x + x) + (y - y) = 10

Or, 2 x + 0 = 10

∴  x = \dfrac{10}{2}

i.e x = 5 mph

So, The speed of the boat = x = 5 miles per hours

Put the value of x into eq A

∵ x + y = 7

Or, 5 + y = 7

∴ y = 7 - 5

i.e y = 2 mph

So, The speed of the current = y = 2 miles per hours

Hence, The speed of the boat is 5 miles per hours and The speed of the current is 2 miles per hours . Answer

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d. 41
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kupik [55]
R in this equation refers to the radius

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Help ASAP!!! Savings Account.Christine Chu borrowed $4500 from a bank at a simple interest rate of 2.5% for one year.
nydimaria [60]

Answer: $112.50 ; $4612.5

Step-by-step explanation:

a) Determine how much interest Christine paid at the end of 1 year.

This will be:

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