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3 years ago

What's the answer to this world problem please:

Mathematics

2 answers:

Usimov [2.4K]3 years ago

7 0

Answer:

19 keyboards

Step-by-step explanation:

Let d = thumb drives; and k = computer keyboards

Total number of sales of thumb drives and keyboards is 50

50 = d + k

Rearranged:

d = 50 - k

Total revenue from the sale of $24 thumb drives and $49 keyboards is $1675

1675 = 24d + 49k

Sub in d = 50 - k

1675 = 24(50 - k) + 49k

1675 = 1200 - 24k + 49k

475 = 25k

k = 475/25

k = 19

(To check, d = 50 - 19 = 31)

Inga [223]3 years ago

3 0

The answer to this question is 10

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For question A) x=15/14

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3 years ago

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How do you graph y = x + 2

Ghella [55]

Answer:

Basically you first start with having a graph with positive and negative numbers on four sides. Then, you start with 2. You have to graph 2 on the positive y section.

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Step-by-step explanation:

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3 years ago

In a large bag of marbles, 20% of them are red. A child chooses 4 marbles from this bag. If the child chooses the marbles at ran

lubasha [3.4K]

Answer:

0.0256

Step-by-step explanation:

Assuming a binomial model, with probability of success (getting a red marble) p = 0.20. The probability of obtaining 'k' successes in 'n' trials is:

$P(x=k)=\frac{n!}{(n-k)!k!}*p^k*(1-p)^{n-k}$

For k = 3 red marbles in n = 4 trials:

$P(x=3)=\frac{4!}{(4-3)!3!}*0.20^3*(1-p)^{4-3}\\P(x=3)=4*0.20^3*0.8\\P(x=3) = 0.0256$

The probability that the child gets exactly three red marbles is 0.0256.

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3 years ago

Is 0.09 more or less than 0.9? same with 0.06 and 0.6.

In-s [12.5K]

.09 is less than 0.9.

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3 years ago

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The equation d = m/v can be used to calculate the density, d, of an object with mass, m, and volume, V. Which is an equivalent e

Pepsi [2]

The equivalent equation solved for v is m/d=v.

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3 years ago

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