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Marat540 [252]
1 year ago
8

Need help please :) I’m not sure how to solve this one either

Mathematics
2 answers:
Andrews [41]1 year ago
6 0
The answer is

580|21

Dmitry_Shevchenko [17]1 year ago
4 0
<h3>Answer: 27 & 13/21</h3>

Your teacher may want you to delete the & symbol.

====================================================

Explanation:

Let's convert each mixed number to an improper fraction.

We'll start with 6 & 2/3

The formula to use is this

a & b/c = (a*c + b)/c

So,

a & b/c = (a*c + b)/c

6 & 2/3 = (6*3 + 2)/3

6 & 2/3 = (18 + 2)/3

6 & 2/3 = 20/3

The mixed number 6 & 2/3 converts to the improper fraction 20/3

Now do the same for the other mixed number as well.

a & b/c = (a*c + b)/c

4 & 1/7 = (4*7 + 1)/7

4 & 1/7 = (28 + 1)/7

4 & 1/7 = 29/7

----------------------------------

The task is to now multiply these improper fractions

Recall that (a/b)*(c/d) = (a*c)/(b*d)

We multiply across the numerators separately and multiply across the denominators separately.

So,

(20/3)*(29/7) = (20*29)/(3*7) = 580/21

The last step is to convert this to a mixed number.

Use a calculator to get 580/21 = 27.6190476190476 approximately.

The stuff to the left of the decimal is the whole part 27, aka the quotient.

The decimal part is then multiplied with the denominator (21) to get 0.6190476190476*21 = 13 which is the remainder.

Quotient = 27, remainder = 13, so 580/21 = 27 remainder 13 = 27 & 13/21

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Answer: The volume of largest rectangular box is 4.5 units.

Step-by-step explanation:

Since we have given that

Volume = xyz

with subject to x+2y+3z=9

So, let z=\dfrac{9-x-2y}{3}

So, Volume becomes,

V=xyz\\\\V=xy(\dfrac{9-x-2y}{3})\\\\V=\dfrac{9xy-x^2y-2xy^2}{3}

Partially derivative wrt x and y we get that

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By solving these two equations, we get that

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So, Volume of largest rectangular box would be

xyz=3\times \dfrac{3}{2}\times 1=\dfrac{9}{2}=4.5

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4 0
3 years ago
The radius of a cylinder is 3 cm and the height is 6 cm.
mars1129 [50]

Answer:

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Option D

4 0
3 years ago
Divide 180 in a ratio of 4:5:9
Amiraneli [1.4K]
Ratio in which 180 should be divided is 4:5:9
firstly we need to find the total number of portions 
this we can find by adding all the numbers making up the ratio 
4 + 5 + 9 = 18
180 is made of 18 portions 
size of 1 portion = 180 / 18 = 10
when dividing 180 into the respective ratio 4:5:9 the portions are as follows
4 x 10 = 40
5 x 10 = 50
9 x 10 = 90
therefore when we divide 180 in the ratio 4:5:9
the answer we get is
40 :50: 90

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3 years ago
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Step-by-step explanation:

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3 years ago
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