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mr Goodwill [35]
3 years ago
13

There are 9 students in a class: 5 boys and 4 girls.

Mathematics
1 answer:
sattari [20]3 years ago
4 0
Where’s the question?
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The math club is holding a fundraiser by selling pies. If they sell each pie for $12, how many pies do they need to sell if they
UNO [17]

Answer:

41.6666667


Step-by-step explanation:

divide 500 by 12

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3 years ago
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Discriminant of 9x^2+12x+4=0
kolbaska11 [484]
9x^2+12x+4=0\\\\(3x)^2+2\cdot3x\cdot2+2^2=0\\\\(3x+2)^2=0\iff3x+2=0\\\\3x=-2\ \ \ /:3\\\\x=-\frac{2}{3}\\\\-------------------------------\\\\(a+b)^2=a^2+2ab+b^2
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3 years ago
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There are 40 students in a class.Girls make up 60%of the class.25% of girls wear glasses.How many girls in the class wear glasse
Stells [14]

Answer:

12

Step-by-step explanation:

40 times 0.6 is 24. 24 times .25 is 12

4 0
2 years ago
A rectangular cow pasture is enclosed on three sides by a fence and the fourth side is part of the side of a barn that is $400$
Rudiy27

Let us list out the given information:

Cost per foot = $5

Total fencing cost = $1200

Let L be the length of the barn that will maximize the area of the pasture and W be the width of the rectangular cow pasture.

From the given information, we need to do the fencing for three sides covering 1 L and 2 W's because other L will be the fourth side is part of the side of a barn. We need to write the equation based on the cost information.

If cost/foot is $5, then cost of length ' L ' will be 5L dollars and cost of '2W' width equals 10W dollars. Total cost is $1200. We can set up second equation as

5L + 10W = 1200. This can be simplified by dividing throughout the equation by 5 to get L+ 2W= 240. Solving for L we get L = 240 - 2W

Area of a rectangle is given by A = L ×W.

Substituting 240 - 2W for L we get the area function as..

A=(240 - 2W)×W= 240W-2W²

A = -2W²+240W.

When we have a function of the form f(x) = ax^2 + bx + c, then maximum value of the function can be obtained for x = -b/2a. Using that idea we can find the maximum area.

Here in the area function a = -2 and b = 240

For W = -b/2a = -240/2(-2) = -240/-4 = 60 feet, we get maximum area.

The question is asking us to find Length. We can substitute W = 60 in the equation L = 240 - 2W to find the Length.

L = 240 - 2(60) = 240 - 120 = 120 feet.

Conclusion: The length of the side parallel to the barn that will maximize the area of the pasture is 120 feet.

Note: Here the information 400 feet in the sentence "the fourth side is part of the side of a barn that is 400 feet long" given to distract us, we might not require that information to find the Length.

3 0
3 years ago
Maria looked at the nutrition labels for 5 different foods. She recorded the total calories and the calories from fat for each f
Nikolay [14]

Answer:

food 1 food 3 food 5

Step-by-step explanation:

3 0
3 years ago
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