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frutty [35]
4 years ago
14

Caitlyn calculated the probability of the complement of rolling a number greater than 2 on a 6-side number cube. She made her ca

lculation as follows.
P (less than 5) = StartFraction Numbers greater than 5 over Numbers less than 5 EndFraction = StartFraction 2 over 4 EndFraction
Did she make an error? Explain.
Mathematics
2 answers:
qwelly [4]4 years ago
6 0

Answer:

Yes, she made an error. Caitlyn should have taken the desired outcomes, rolling a 3, 4, 5, or 6, and divided that by the total possible outcomes to get a probability of 4/6, or 2/3. She should have subtracted this probability from 1 to get the complement, which is 2/6, or 1/3.

coldgirl [10]4 years ago
3 0

Answer: b

Step-by-step explanation:

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Please answer!!!!<br> Express (x + 9)2 as a trinomial in standard form.
Ghella [55]

Answer:

x² +18x +81

Step-by-step explanation:

(a+b)²=a²+b²+2ab

(x+9)² = x²+9²+2*x*9= x² +18x +81

4 0
3 years ago
Select the correct answer.
labwork [276]

Answer:

Your answer would be C. x2 + y2 − 4x − 4y + 23 = 0

Step-by-step explanation:

I did this question before. Hope it helps! :D

3 0
3 years ago
Find: (i) (-3/5) + (-2/7) (ii) (-2/7) -<br>(-3/14) (iii) (- 4/ 9) = (- 2/3)​
Sholpan [36]

Answer:

I. 1/5

II. -1/14

III. 2/9

Step-by-step explanation:

(i) (-3/5) + (-2/7)

Opening up the bracket;

3/5 - 2/5 =

Lowest common multiple (LCM) = 5

(3 - 2)/5

= 1/5

(ii) (-2/7) - (-3/14)

Opening up the bracket;

-2/7 + 3/14 =

Lowest common multiple (LCM) = 14

(-4 + 3)/14 = -1/14

(iii) (-4/ 9) = (- 2/3)

Rearranging the fraction, we have;

-4/9 + 2/3 =

Lowest common multiple (LCM) = 9

(-4 + 6)/9 = 2/9

5 0
3 years ago
Need help with number 3a and 3b ?
kow [346]

Answer:

4 and 4.1

Step-by-step explanation:

because sqrrt17 is about 4.123 (memmorized) and it's rounded down to 4 and down to 4.1

8 0
3 years ago
Q..3/4 of a piece of metal has a mass on 15 kg. What is the mass of 2/5 of a piece of metal ?
Margarita [4]

Answer

8kg

Explanation

3/4--------15

2/5-------x

cross multiplying

3/4×X = 2/5×15

3X/4 = 30/5

3X/4 = 6

cross multiplying

3X = 4×6

3X = 24

dividing bothsides by 3

3X /3 = 24/3

X = 8

therefore, the answer is 8 kg

8 0
2 years ago
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