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Evgesh-ka [11]
2 years ago
6

Lots of points.

Mathematics
1 answer:
Kazeer [188]2 years ago
3 0

Answer:

1.  Not a function.

2. This is a function.

3. This is a function.

Step-by-step explanation:

1. 13 maps on to 4 and -4 so not a function.

2 and 3 - these both pass the vertical line test so they are functions.

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Help!! I am going to fail my class!!! I will mark you brainiest!
adoni [48]

Answer:

600,000(.90)       327,290

Step-by-step explanation:

6 0
3 years ago
Simplify the polynomial: 2(x+8)-5(x-3)
jarptica [38.1K]

Answer:

-3x + 31

Step-by-step explanation:

First distribute

2x + 16 -5x +15

Collect like terms

-3x + 31

3 0
3 years ago
a ships pilot knows that a building on the coast is 100 meters tall. if he finds the angle of elevation to be 2 degrees how far
irina [24]

Answer:

it is about 34 degrees celisuis to the right of the horizontal perimeter.

Step-by-step explanation:

8 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
Eric needs 27 batches of b<br> Trial mix. How many batches will he need to make?
Ipatiy [6.2K]

Answer:

I mean if he needs 27 batches he'll make 27 batches?

8 0
2 years ago
Read 2 more answers
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