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kondor19780726 [428]
3 years ago
14

If 2x/2y=16,what is the value of x-y?

Mathematics
1 answer:
kotegsom [21]3 years ago
8 0

Answer:

15y

Step-by-step explanation:

first the 2 can cancel:

\frac{2x}{2y} =16

turns into:

\frac{x}{y} =16

now since we need to find x-y,

x=16y

16y-y=15y

I might come back to this because I'm not 100% sure this is the answer you are looking for. Let me know if you have any questions.

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In a shipment of airplane parts, 5% are known to be defective. If 21 parts are found to be defective, how many parts are in the
horrorfan [7]

We can use ratios and the cross-multiply-divide to find this.



The ratio 21:5 is avaliable via the question. We then need to compare that to the ratio x:100, the 100 being the percent and the x being the number of airplane parts.



21/5 = x/100



We can then solve for x to find the number of airplane parts. First we multiply by 100 on both sides to get 2100/5 = x. Therefore x = 420 and there are 420 airplane parts.

7 0
3 years ago
The table shows ticket prices for the local minor
Zanzabum

Answer:

2x club member ticket = 1x non-club member ticket

6 0
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An Item has a listed price of $30. If the sales tax rate is 5%, how much is the sales tax (in doll
DochEvi [55]

Answer:

sales tax is 1.5

Step-by-step explanation:

4 0
3 years ago
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From their location in the diagram, what are two possible values for m and n?
yarga [219]
M=6/5 and n = sqrt(2), is rational (but not an integer) and n is irrational.

The case with n = sqrt(9)=3, is not a solution. The case with m=4pi neither.

The last case is m = 6/2=3, integer, so neither works.

So, it is the one with m=6/5 and sqrt(2)
3 0
3 years ago
a lottery costs $1 per ticket. the player selects a sincle letter from A to T and a single digit from 0 to 9. if both the letter
lara [203]
<h3>Answer:  0.25 dollars (ie 25 cents)</h3>

================================================

Explanation:

The letter T is the 20th letter in the English alphabet. This means that there are 20 letters to pick from to go with the 10 single digit numbers to pick from. We have 20*10 = 200 different combinations (eg: one combination is K4).

Out of these 200 combinations, there is exactly one winning match.

The probability of winning is therefore P(W) = 1/200 = 0.005 and the probability of losing is P(L) = 1-P(W) = 1-0.005 = 0.995 where W and L represent winning and losing respectively.

The net value of winning is V(W) = 250 - 1 = 249 because the player wins $250 but they lose $1 (which is the cost of the ticket). The net value of losing is V(L) = -1, indicating the player has lost that $1 and hasn't gained any money at all.

-----------

To summarize so far:

P(W) = 0.005

P(L) = 0.995

V(W) = 249

V(L) = -1

Multiply the probability P values with the corresponding net values V, then add up the products to get the expected value:

E(X) = P(W)*V(W) + P(L)*V(L)

E(X) = 0.005*249 + 0.995*(-1)

E(X) = 0.25

The expected value is 0.25 dollars or 25 cents

This positive expected value means that the game is favored toward the player, because over the long run, the player gains an average of 25 cents each time they play. On the other side of the spectrum, the lottery company loses on average 25 cents each time. The nonzero expected value means that the game is not fair.

7 0
3 years ago
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