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3 years ago

What is 820 divided by 42

Mathematics

2 answers:

Dafna11 [192]3 years ago

3 0

The correct answer to 820/42= 19.52 (rounded answer would be 20). I hope I helped :)

fomenos3 years ago

3 0

Your answer is 19.5.. Hope this helps :)

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A positive integer is twice another.the sum of the reciprocal of the two positive integer is 3/14. Find the integers

icang [17]

Answer:

$\huge\boxed{14\ \text{and}\ 7}$

Step-by-step explanation:

$n,\ m-\text{positive integer}\\\\n=2m-\text{a positive integer is twice another}\\\\\dfrac{1}{n}+\dfrac{1}{m}=\dfrac{3}{14}-\text{the sum of the reciprocal of the two positive integer is }\ \dfrac{3}{14}\\\\\text{We have the system of equations:}\\\\\left\{\begin{array}{ccc}n=2m&(1)\\\dfrac{1}{n}+\dfrac{1}{m}=\dfrac{3}{14}&(2)\end{array}\right$

$\text{Substitute (1) to (2):}\\\\\dfrac{1}{2m}+\dfrac{1}{m}=\dfrac{3}{14}\\\\\dfrac{1}{2m}+\dfrac{1\cdot2}{m\cdot2}=\dfrac{3}{14}\\\\\dfrac{1}{2m}+\dfrac{2}{2m}=\dfrac{3}{14}\\\\\dfrac{1+2}{2m}=\dfrac{3}{14}\\\\\dfrac{3}{2m}=\dfrac{3}{14}\Rightarrow2m=14\qquad\text{divide both sides by 2}\\\\\dfrac{2m}{2}=\dfrac{14}{2}\\\\\boxed{m=7}$

$\text{Substitute it to (1):}\\\\n=2\cdot7\\\\\boxed{n=14}$

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2 years ago

Sifa has $156 in the bank. He needs to have at least $400 for spending money on his trip. Write and solve an inequality to find

gregori [183]

Sifa needs to earn $244

Solution
400-156=244

Therefore, He needs to earn $244 more before his trip.

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2 years ago

How do find volume of the triangular pyramid, I’m so confused I need the formula as well ASAP,!!,, please thanks so much

lidiya [134]

Answer:

5100

Step-by-step explanation:

20 x 17 x 15 = 5100. hope this helps you!!!

also formula is 1/2 x b x h x l

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3 years ago

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7nadin3 [17]

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3 years ago

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