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klio [65]
3 years ago
6

7. Alex has 4 red marbles 3 blue marbles, 2 yellow marbles, 6 purple marbles, and one white marble. Alex picked a marble out of

the bag, recorded the color in the chart (to the right), then replaced the marble. He repeated this experiment fifteen times. COLORS FREQUENCY
What is Alex's experimental probability of Red getting a blue?

b. What is Alex's theoretical probability of getting a blue?​

Mathematics
1 answer:
shtirl [24]3 years ago
7 0

Answer:

B

Step-by-step explanation:

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Compare the scores: a score of 75 on a test with a mean of 65 and a standard deviation of 8 and a score of 75 on a test with a m
LiRa [457]

Answer:

The Zscore for both test is the same

Step-by-step explanation:

Given that :

TEST 1:

score (x) = 75

Mean (m) = 65

Standard deviation (s) = 8

TEST 2:

score (x) = 75

Mean (m) = 70

Standard deviation (s) = 4

USING the relation to obtain the standardized score :

Zscore = (x - m) / s

TEST 1:

Zscore = (75 - 65) / 8

Zscore = 10/8

Zscore = 1.25

TEST 2:

Zscore = (75 - 70) / 4

Zscore = 5/4

Zscore = 1.25

The standardized score for both test is the same.

7 0
2 years ago
2x - 20 = 32<br><br> 20 - 3x = 8<br><br> 6x - 8 = 16<br><br> -13 - 3x = -10
levacccp [35]

Answer:

Step-by-step explanation:

1st one is x=26

2nd one is x=4

3rd is x=4

4th is x=-1

Hope that helps!

7 0
3 years ago
Read 2 more answers
Find the slope of each line.<br><br> through (-2,7) and (4,1)
Virty [35]

the answer would be 3 I believe

6 0
3 years ago
Read 2 more answers
Evaluate 4x^2-12x+5 at x=6. A. 67 B. 77 C. 105 D. 221
Kamila [148]

Answer: B. 77

Sub x =6 into the given expression

4x^2 - 12x + 5

= 4(6)^2 - 12(6) + 5

= 144 - 72 + 5

= 77

3 0
2 years ago
Tristan is working on dilating rectangles. Rectangle ABCD is dilated by a factor of 3. The resulting rectangle WXYZ has an area
zloy xaker [14]

Answer:

Tristan is correct, because he needs to find the possible dimensions for rectangle WXYZ and then divide each dimension by 3.

Step-by-step explanation:

The rectangle ABCD is dilated by a factor of 3 to get the rectangle WXYZ whose area is found to be 72 cm².

Let the dimensions of the dilated rectangle WXYZ are a cm by b cm.

So, ab = 72 ........... (1)

Now, the dimensions of the original rectangle are 3 times lesser than the dimensions of rectangle WXYZ.

So, the area of rectangle ABCD will be (\frac{a}{3} \times \frac{b}{3}) = \frac{ab}{9} = \frac{72}{9} = 8 cm² {from equation (1)}

Therefore, Tristan is correct, because he needs to find the possible dimensions for rectangle WXYZ and then divide each dimension by 3. (Answer)

8 0
2 years ago
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