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Paul [167]
3 years ago
10

9 markers cost $11.50. How much would 7 markers cost?

Mathematics
2 answers:
Anna007 [38]3 years ago
8 0

Answer:

7 markers cost $8.95

Step-by-step explanation:

9x = 11.50

x = 11.5/9 = 1.278

Therefore, 7 markers, or 7x = 7(1.278) = 8.946

kicyunya [14]3 years ago
7 0

Answer:

5.48

Step-by-step explanation:

​11.50

​

0.782609=\frac{x}{7}0.782609=

5.478261=x5.478261=x

4 Switch sides.

x=5.478261x=5.478261

the answer is 5.48

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What number do you reach when you start at -7 and move 3 units to the right ​
Vesna [10]

Answer: The number you reach would be -4

Step-by-step explanation:

5 0
3 years ago
A spinner has 12 equal sections:5 red 4 green and the rest are black. In 921 spins how many times can you expect to spin black?
Komok [63]

Answer:

230

Step-by-step explanation:

12 sections total

5 red, 4 green, the rest black

12-5-4 = 3 sections are black

3/12 = 1/4 of the sections are black

1/4 represents the probability of landing on black for one spin

(1/4)*921 = 230.25 which rounds to 230

We expect to land on a black section about 230 times out of 921 times total.

8 0
3 years ago
Please help me with this question. Thanks!
olasank [31]

Assuming that all the grapes have the same probability of being randomly picked:

  • a) 0.11
  • b)  0.24

<h3>How to find the probabilities?</h3>

We know that there are 8 green grapes and 15 red grapes on the bowl, so there is a total of 23 grapes.

a) Here we need to find the probability that both grapes are green. Remember that the probability of getting a green grape is equal to the quotient between the number of green grapes and the total number of grapes, this is:

P = 8/23

But then he must take another, because he already took one, the number of green grapes is 7, and the total number of grapes is 22, so for the second grape the probability is:

P' = 7/22.

The joint probability is the product of the two individual probabilities:

prob = (8/23)*(7/22) = 0.11

b) For the first green grape we know that the probability is:

P = 8/23

Then he must get a red grape. There are 15 red grapes and 22 grapes in total, so the probability is:

P' = 15/22

Then the joint probability is:

prob = (8/23)*(15/22) = 0.24

If you want to learn more about probability:

brainly.com/question/25870256

#SPJ1

8 0
2 years ago
When the data have the properties of ordinal data and the interval between observations is expressed in terms of a fixed unit of
seropon [69]

Answer: Interval

Step-by-step explanation:

When there is a fixed unit of measure that means arithmetic operations like addition and subtraction can be done on it. So it is interval scale of measurement.

8 0
3 years ago
What does x-5x=?<br> Is it -4x?
alukav5142 [94]

Answer:

It is -4x

Step-by-step explanation:

Good Job!!

3 0
3 years ago
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