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Talja [164]
2 years ago
10

Help I'm trying to do this but i cant

Mathematics
1 answer:
Anna71 [15]2 years ago
3 0

Answer:

Learn PEMDAS on YT

Step-by-step explanation:

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The probability that a student uses Smarthinking Online Tutoring on a regular basis is 0.31 . In a group of 21 students, what is
Ivenika [448]

Answer: 0.0241

Step-by-step explanation:

This is solved using the probability distribution formula for random variables where the combination formula for selection is used to determine the probability of these random variables occurring. This formula is denoted by:

P(X=r) = nCr × p^r × q^n-r

Where:

n = number of sampled variable which in this case = 21

r = variable outcome being determined which in this case = 5

p = probability of success of the variable which in this case = 0.31

q= 1- p = 1 - 0.31 = 0.69

P(X=5) = 21C5 × 0.31^5 × 0.69^16

P(X=5) = 0.0241

4 0
3 years ago
How many letters are in this sentence that you are reading right now?
Mila [183]

Answer:

56 letters

Step-by-step explanation:

6 0
2 years ago
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A) Solve the system by substitution.<br> y = 5x – 3<br> -X – 5y = -11
Katen [24]

Answer:

Step-by-step explanation:

the answer 4x-5y +2 = 0. 5y =-4x-2. y = -4x/5 -2/5 slope = -4/5

8 0
2 years ago
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In ΔBCD, the measure of ∠D=90°, DC = 55, CB = 73, and BD = 48. What ratio represents the cosine of ∠C?
Vladimir [108]

Answer:

48/73

Step-by-step explanation:

cosine = adjacent/hypotenuse

= 48/73

8 0
2 years ago
One reading at an Arctic research station showed that the temperature was -35C. What is this temperature in degrees Fahrenheit?
ycow [4]

Answer:

-31°F

Step-by-step explanation:

To convert temperatures in degrees Celsius to Fahrenheit, multiply by 1.8 (or 9/5) and add 32.

7 0
3 years ago
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