MATHEMATICS MIDDLE SCHOOL

A number cube is rolled 360 times. And the results are recorded as follows: 54 ones, 60 twos, 66 threes, 71 fours, 35 fives, and 74 sixes. What is the experimental probability of rolling a two or a three? a) 0.15 b) 0.1 c) 0.35 d) 0.65

Answers

Answer 1
Answer:

Answer: c) 0.35

Step-by-step explanation:

Let A be an event of rolling a two and B be an event of rolling a three.

Then the probability of rolling a two is given by :-

\text{P(2)}=(60)/(360)=(1)/(6)

Then the probability of rolling a three is given by :-

\text{P(3)}=(66)/(360)=(11)/(60)

Now, the experimental probability of rolling a two or a three is given by :-

\text{P(2)}+\text{P(3)}\n\n=(1)/(6)+(11)/(60)\n\n=(10+11)/(60)\n\n=(21)/(60)=0.35

Hence, the  experimental probability of rolling a two or a three is 0.35 .
Answer 2
Answer: Since you rolled 60 twos and 66 threes out of 360 times this experimental probability is (60+66)/360=126/360=0,35 which is c)

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restaurant etiquette dictates that you should leave a 15% tip for the server if the service is acceptable. If that is the case, how much should you tip if your total is $24.00

Answers

3.60
bc using a part to whole chart you cross multiply 24*15 get 360 then divide it by 100 and get 3.60

Answer:

Your tip should be $3.60

Step-by-step explanation:

24.00*.85=20.4

24.00-20.4=3.60

only 6 of the 75 trees in the park are at least 30 feet tall. what percentage of the trees are under 30 feet tall?

Answers

Total number of trees in the park = 75
Number of trees that are at least 30 feet tall = 6
Then
Number of tress that are less than 30 feet tall = 75 - 6
                                                                          = 69
So
Percentage of trees that are less than 30 feet tall = (69/75) * 100
                                                                                = (69 * 4)/3
                                                                                 = 276/3
                                                                                 = 92 percent
So the percentage of trees that are below 30 feet is 92%. I hope the procedure is clear enough for you to understand.
Hi

75-6 = 69 trees

69/3 = 23
75/3 = 25

69/75 = 23/25 = 0,92 = 92% are under 30 feet tall

    23 |_25_
- 230  0,92
  225 
 -------
   050
 - 050 
   ------
      0

Each row of the grocery parking lot has 10 parking spots of equal width. What is the width for each spot? Combined with of the grocery store is 31.92.

Answers

Answer:

The answer is 3.192 width each spot.

Step-by-step explanation:

You have this information:

  • The total width of the grocery is 31.92.
  • 10 parking spots of equal width.

If you assume that the width of these 10 parking spots is the same width of the total width of the grocery, then you have:

10x=31.92

//divide by 10 both sides of the equation

10x/10 = 31.92/10

x = 3.192
Well if you mean that the total width of all the parking spots is 31.92 then you would just divide that by 10 to get 3.192 but if you mean that it's 31.92 with the grocery store too then you need to know how wide the grocery store is too.

Which of the following statements is not true a polygon has the same number of angles as it has sides in a regular polygon all sides are congruent and all angles are congruent sometriangles are regular all heptagons have 6 vertices

Answers

The statement that is not true is that all heptagons have 6 vertices.

What shapes are heptagons?

A heptagon is known to be one that has seven-sided polygon. It is often called  a septagon or a 7-gon.

The word heptagon is known to originate from two words called 'hepta', that stands for seven and 'gon' that stands for sides and they do not have 6 vertices.

Learn more about heptagons from

brainly.com/question/25959287
the one that is false is the last one: heptagons have 6 vertices. this is false as they actually have 7

hope this helps :)

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Answers

4x+3x-8=90\n7x=98\nx=14\n\n\angle CDJ=3\cdot14-8=34^(\circ)

The 'x' and 'y' axes are perpendicular.
So angle ADJ is 90 degrees.

So (4x) + (3x-8) = 90 degrees.

Solve that and you'll know what 'x' is.

Then angle CDJ is just (3x-8).

I'm sure you can handle it from here.

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Answers

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