Perform the indicated operation. (9x2 - 4x2 + 2x + 3) + (-5x3 + 7x2 - 6x + 5)
A)
4x + 3x2 - 4x + 8
B)
14x? - 11x2 + 3x + 8
4x3 - 3x2 + 4x+8
D)
14x? - 11x2 - 6x + 2

27+4x

Step-by-step explanation:

First bracket :9×2-4×2+2x+3=18-8+2x+3,second bracket :answer =-1-6x+5 combine both and get :27+4x

step-by-step explanation: a reaction is first order. if the initial reactant concentration is 0.0200 m, and 25.0 days later the concentration is 6.25 x 10-4 m, then its half-life is:

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

happy to

pls mark as brainliest