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2 years ago

A card is drawn from a standard deck. Find the probability of drawing a heart or a 7.

Mathematics

1 answer:

Mazyrski [523]2 years ago

6 0

<h3>Answer: 4/13</h3>

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Explanation:

There are A = 13 hearts and B = 4 copies of "7"

The count A+B = 13+4 = 17 may seem like it's the count of hearts or "7" cards, but we're double counting the 7 of hearts. So the true count is actually 17-1 = 16

There are 16 cards we want (either a heart or a "7") out of 52 total. Therefore, the probability is 16/52 = (4*4)/(4*13) = 4/13

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Write an inequality to match each description. Use n for the variable.

mel-nik [20]

${\huge {\mathfrak {Answer :-}}}$

Let, the length be l and breadth be b.

So, 2(l + b) = 26

Or, l + b = 13

Or, l = 13 - b

So, we may write like this,

Area = l * b

Or, l * b > 30

Or, l (13 - l) > 30

Or, 13l - l^2 > 30

Or, l^2 - 13l + 30 > 0

Or, l^2 - 3l - 10l + 30 > 0

Or, l(l - 3) - 10(l - 3) > 0

Or, (l - 3)(l - 7) > 0

Or, l - 7 > 0

Or, l > 7.

Now, putting the value of l,

We get, l * b > 30

Or, 7 * b > 30

Or, b > 30/7

➡️ Therefore, we get,

Length > 7

Breadth > 30/7

That's it..

6 0

3 years ago

describe the relationship between n and 4 that will make the value of the expression 7× n/4 greater than 7

Norma-Jean [14]

So set up an equation!

7* n/4 > 7

So trying to get the variable alone...

n/4 > (7/7) aka 1
n> 1*4
n> 4

Try it out!

7* 6/4 = 42/4 = 21/2= 10 and 1/2

It is greater than 7

7 0

3 years ago

What is 2 meters and 10 cm together

Alika [10]

10cm=10 * 10^-2 = 10^-1 meters

so its 2 meters + 0.1 meters = 2.1 meters

4 0

3 years ago

A circle of radius 32cm is cut into 8 equal parts calculate the perimeter of each part giving your answer correct to the nearest

erastovalidia [21]

I think it’s 16

Radius of circle = 32
Diagonal of circle = 64 cm
So 64 divided by 8 = 16
Mark me as brainliest

3 0

2 years ago