Answer:
2.3
Step-by-step explanation: if your finding the decimal 2.3 will be your answer if not then sorry
Add up all the sides is one way I think and then try to find the volume like add them all up then divide them by 2
12+8+8=28
8 students are wearing a blue shirt so the probability is 8/28
x =
or x = - 
consider the factors of the product 6 × - 4 = - 24 which sum to the coefficient of the x- term ( + 5)
the factors are + 8 and - 3 ( split the middle term using these factors
6x² - 3x + 8x - 4 = 0 ( factor by grouping )
3x(2x - 1) + 4(2x - 1 ) ( take out common factor of (2x - 1) )
= (2x - 1)(3x + 4) = 0
equate each factor to zero and solve for x
2x - 1 = 0 ⇒ x = 
3x + 4 = 0 ⇒ x = - 