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givi [52]
3 years ago
7

If they are drawn with replacement, what is the probability that both cards are 10s?

Mathematics
1 answer:
Natasha_Volkova [10]3 years ago
8 0
The probability that the second card is a queen should be the same as the probability that the second card is an ace, and the same as the probability that the second card is a 2 etc. There are <span>1313</span><span>possibilities for the card number/letter, so the answer is 1/13</span>
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A1 = 7 and r = 5<br> I need this please
Sloan [31]
A=7 is what I got since this was a equation problem
3 0
3 years ago
A 25% vinegar solution is combined with triple the amount of a 45% vinegar solution and a 5% vinegar solution resulting in 20 mi
Murrr4er [49]

Complete Question: A 25% vinegar solution is combined with triple the amount of a 45% vinegar solution and a 5% vinegar solution resulting in 20 milliliters of a 30% vinegar solution.

Write an equation that models this situation and explain what each part represents in the situation. Then solve the equation.

Step-by-step explanation:

let the volume of the 45% vinegar solution be x litres ,

the volume of the 25% vinegar solution be 3x

and the volume of the 5% vinegar solution be y

summation of all gives,

x+3x+y = 20

4x + y = 20

subtracting 4x from both sides to make y the subject of the equation, we have;

y = 20 - 4x

To the concentration:

substituting for the value of x and y into equation x + 3x + y = 20, we have,

.45x + .25(3x) + .05(20-4x) = .3(20)

multiplying through by 100  to make whole figures we have;

45x + 25(3x) + 5(20-4x) = 600

45x + 75x + 100 - 20x = 600

120x - 20x + 100 = 600

100x + 100 = 600

subtracting 100 from both sides, we have;

100x = 600 - 100

100x = 500

dividing both sides by 100,

x = 5.

7 0
3 years ago
PLEASE 10 PTS!!
ira [324]
Its c because first 14 he got -42 the four remaining he got 8=-34
6 0
3 years ago
Read 2 more answers
May have to flip or look closely in order to see the question. Brainliest involved
Gwar [14]

Answer:

The answer is step 5

Step-by-step explanation:

flip the sign

5 0
3 years ago
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nikitadnepr [17]

Answer:

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Step-by-step explanation:

3xy^2 (2y+4z)

Multiply

3xy^2 * 2y + 3xy^2 *4z

common factors

3xy^3 +3xy^2 *4z

Multiply

6xy^3 +12xy^2 z

7 0
3 years ago
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