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leonid [27]
2 years ago
6

What’s the value of x

Mathematics
1 answer:
PolarNik [594]2 years ago
6 0

Answer:

Go to school

Step-by-step explanation:

Focuss in school

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) the top and bottom margins of a poster are 4 cm and the side margins are each 5 cm. if the area of printed material on the pos
grin007 [14]
If x represents the width of the poster (including borders), the area of the finished poster can be written as
.. a = x*(390/(x -10) +8)
.. = 8x +390 +3900/(x -10)

Then the derivative with respect to x is
.. da/dx = 8 -3900/(x -10)^2
This is zero at the minimum area, where
.. x = √(3900/8) +10 ≈ 32.08 . . . . cm
The height is then
.. 390/(x -10) +8 = 8 +2√78 ≈ 25.66 . . . . cm

The poster with the smallest area is 32.08 cm wide by 25.66 cm tall.

_____
In these "border" problems, the smallest area will have the same overall dimension ratio that the borders have. Here, the poster is 10/8 = 1.25 times as wide as it is high.
8 0
3 years ago
A recipe calls for 3 cups of sugar to make one batch how many cups of flour and sugar would you need to make 4 batches?
Alla [95]

Answer:

12?

Step-by-step explanation:

you didnt mention how many cups of flour to make one bath but you need 12 cups of sugar for 4 batches

5 0
2 years ago
Read 2 more answers
Find the mean of 100​
goldfiish [28.3K]

Answer:

100.

Step-by-step explanation:

100 + 0 = 100

100 ÷ 1 = 100

8 0
2 years ago
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Please help me. I am having some trouble with these problems
s344n2d4d5 [400]

Answer:

Step-by-step explanation:

This is a proportion problem. I think you just lost a zero.

12/100 = 9/x                    Cross multiply

12x = 100*9                      Combine the right.

12x = 900                         Divide by 12

12x/12 = 900/12

x = 75 grams

So if you put 75 grams of tasty Oats in a bowl and covered it with milk the cereal would give you 9 grams of Protein.

2.

1 gram of Tasty Oats cereal contains 12/100 = 0.12 grams of protein.

1 gram of Cornbits contains 5/45 = 0.11 grams of protein.

By the narrowest of margins the Tasty Oats has more protein in it.

4 0
3 years ago
Salma received a $70 gift card for a coffee store. She used it in buying some coffee that cost $7.61 per pound. After buying the
rosijanka [135]

Answer:

4

Step-by-step explanation:

Amount spent on coffee = 70 - 39.56 = 30.44

One pound costs 7.61, how many will cost 30.44

7.61 : 1 = 30.44 : X

7.61 = 30.44/X

X = 30.44/7.61

X = 4

7 0
2 years ago
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