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Goshia [24]
3 years ago
8

four cards numbered 1, 5, 8, and 9 are placed in a bag. A card is drawn at random and then replaced. Then a card is drawn at ran

dom again. What is the probability that both cards drawn have the number 9.
Mathematics
1 answer:
Vadim26 [7]3 years ago
6 0

Answer:

1/16

Step-by-step explanation:

Four cards numbered (1, 5, 8,9)

Given the sample space S= 4

1.The first selection with replacement

Probability of picking a 9= 1/4

2. Second selection, probability of picking a 9= 1/4

Hence the probability that both cards drawn have the number 9.

Is = (1/4)*(1/4)= 1/16

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Help me asap! <br><br><br> please help
OLEGan [10]

cross multiply:

21*9 = 189

7*q = 7q

so you have 189/7q

 divide 189 by 7 to get q

189 / 7 =27

q = 27

8 0
3 years ago
A taco stand sells tacos for $3.25 each. The stand’s expenses for the day are $210. Define your
Alona [7]
<span>X is the number of tacos needed to make $210.
3.25X greater than or equal to $210.
X greater than or equal to 210/3.25.
X greater than or equal to 64.6.
The stand needs to sell at least 65 tacos to make a profit. </span>
7 0
3 years ago
A shopping centre wants to examine the amount of space required for parking. Studies indicated that 50% of staff and shoppers us
lbvjy [14]

Answer:

The survey result doesn't indicate the change

Step-by-step explanation:

Previous study result is 50%

<u>Survey result:</u>

  • 483/1002 = 0.482 = 48.2%

<u>Comparing with previous result:</u>

  • 50% - 48.2% = 1.8% < 5%

Since this result is within 5% level of significance, it can be concluded that the survey result doesn't indicate the change

6 0
3 years ago
Hint: The y angle and the (3x - 26) angle are vertical angles. So are the (x+y) and 102 angles. Use those facts to write a two e
Ksju [112]

Answer:

\angle IMN = 70\°

Step-by-step explanation:

Given:

\angle IMN = y\°\\\\\angle M =(3x-26)\°\\\\\angle JIL =102\°\\\\\angle KIM = (x+y)\°

We need to find the ∠ IMN

Solution:

Now we know that;

∠ IMN = ∠ M ( Vertically opposite angles)

Substituting the values we get;

y =3x-26\\\\3x-y =26 \ \ \ \ equation \ 1

Also We know that;

∠ JIL = ∠ KIM ( Vertically opposite angles)

Substituting the values we get;

x+y =102 \ \ \ \ equation \ 2

Now adding equation 1 and equation 2 we get

(3x-y)+(x+y) =102+26\\\\3x-y+x+y = 128\\\\4x=128

Dividing both side by 4 using division property of equality we get;

\frac{4x}{4} = \frac{128}{4}\\ \\x= 32

Now Substituting the value of 'x' in equation 2 we get;

x+y=102\\\\32+y =102\\\\y =102-32 = 70

Hence \angle IMN = 70\°

3 0
3 years ago
A density graph for all the possible heights between 0 inches and 80 inches is
Dmitriy789 [7]
Density graphs have an area of 1 to represent 100% of the possibilities.

The length is 80

80 * height = 1
Height = 1 / 80
Height = 0.0125 (D)
4 0
1 year ago
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