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Bond [772]
2 years ago
8

There are 500 students in a school, 220 like science subject, 180 like math and 40

Mathematics
1 answer:
zmey [24]2 years ago
3 0

Answer:

science only is 220

math only is 180

either math or science is 60

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ollegr [7]

Step-by-step explanation:

Since x² + 3x - 4 = (x + 4)(x - 1), the correct answer is D.

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Who likes anime??<br> I like anime‍♀️......
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3 years ago
A farmer finds that if she plants 85 trees per acre, each tree will yield 80 bushels of fruit. She estimates that for each addit
vova2212 [387]

Answer:

52 Trees

Step-by-step explanation:

If she plants 85 trees per acre, each tree will yield 80 bushels of fruit.

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Let x be the additional tree planted per acre.

For each additional tree planted per acre, the yield of each tree will decrease by 4 bushels.

Therefore, the yield:

F(x)=(85+x)(80-4x)\\F(x)=6800-260x-4x^2

Next, we maximize F(x) by taking its derivatives and solving for its critical point.

F'(x)=-260-8x\\$Setting $F'(x)=0,$ we have:$\\-260-8x=0\\8x=-260\\$Divide both sides by 8$\\x=-32.5

F''(x)=-8, $therefore we have a maximum

It is apparent that she currently has too many trees per acre. To get a maximum harvest, she needs to reduce the number of trees by approximately 32.5 trees.

Therefore, number of trees per acre she should plant:

85+(-32.5)

=85-32.5

=52.5 Trees

Since the number of trees can only be an integer and it cannot be greater than 52.5, the number of trees to be planted per acre to maximize her harvest is 52.

5 0
4 years ago
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3 years ago
A model of a building is made using a scale of 1 inch = 25 feet. what is the height of the actual building of the height of the
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1 in. = 25 ft. 

12.5 in. = ___ft 

25/1=25

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So the answer to your question is 312.5 feet.

Hope this helps! :)  


7 0
3 years ago
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