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earnstyle [38]
3 years ago
12

Rosa saved up her money and bought a model train. Each of the 8 cars on the train was the same length. When Rosa put all the car

s together, the train was 3 feet long. How long was each car? ​
Mathematics
1 answer:
Natalka [10]3 years ago
3 0

Answer:

4.5 inches long

Step-by-step explanation:

3 feet is equal to 36 inches, so you do 36/8 which equals out to 4.5 inches per car

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X + 2xy- y^2 = 2<br><br> find dy/dx using implicit differentiation
AleksandrR [38]

Answer:

hope that helps

Step-by-step explanation:

3x^2+2xy+y2=2

6x + 2y + 2xy' + 2yy' = 0

x=1 ==> y=-1

6(1) + 2(-1) + 2(1)y' + 2(-1)y' = 0

6 - 2 + 2y' - 2y' = 0

4 = 0

(e) undefined

The graph is an ellipse. At (1,-1) there is a vertical tangent

8 0
3 years ago
1. Given the points P (1, - 4). Q (3,-2), R (-3,5), find the coordinates of the mid-points A and B of PO and PR respectively and
aleksandrvk [35]
1583.34 there you go
5 0
2 years ago
Please answer quickly thanks :)
Bezzdna [24]

b< 11: The board is shorter than 11 cm

b > 11: The box contains more than 11 books

b < 12: There are fewer than 12 beetles in a jar.

b > 12: The building is taller than 12 ft

5 0
3 years ago
The standard configuration for an Arizona license plate is 3 digits (0 - 9) followed by 3 letters (of 26). If you can not repeat
Anna71 [15]

Answer:

11232000 plates can be made.

Step-by-step explanation:

The order of the digits and of the letters is important. For example, ABC is a different configuration than CBA. So we use the permutations formula to solve this question.

Permutations formula:

The number of possible permutations of x elements from a set of n elements is given by the following formula:

P_{(n,x)} = \frac{n!}{(n-x)!}

In this question:

3 digits from a set of 10(there are 10 digits from 0 to 9).

3 letters from a set of 26. So

Total:

T = P_{(10,3)} \times P_{(26,3)} = \frac{10!}{(10-3)!} \times \frac{26!}{(26-3)!} = 11232000

11232000 plates can be made.

5 0
3 years ago
If 2 cards are selected from a standard deck of 52 cards.The first card is placed back in the deck before the 2nd card is drawn.
Mkey [24]

There are 13 cards of each suit.

Picking a heart would be 13/52 which reduces to 1/4

Then replacing the card and picking a club would be the same : 1/4

Picking a heart then a club would be 1/4 x 1/4 = 1/16

Answer: 1/16

7 0
2 years ago
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