Amath teacher randomly selects one student in a class to write a probability question on a chalkboard. the teacher then randomly selects a different student to answer the probability question. there are 12 boys in the class, and the ratio of boys to girls is 2: 3. find the probability that the teacher selects a girl first and a girl second. write your answer as a decimal rounded to the nearest thousandth.

The probability that the teacher selects a girl first and a girl second is 0.352

Step-by-step explanation:

Number of boys in class = 12

let number of boys in class = 2x

number of girls in class = 3x

According to the question,

2x = 12

x = 6

So, number of girls = 3x = 3 × 6 = 18

Total number of students = 18 + 12 = 30

Probability of selecting a girl first and second girl =

Therefore, The probability that the teacher selects a girl first and a girl second is 0.352

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

answer:

f(5/2) = 10/3

i hope this you!

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk