Use substitution to write an equivalent quadratic equation. (3x + 2)2 + 7 (3x + 2) – 8 = 0 - u2 + 74 - 8 = 0, where u = (3x + 2)2 u2 + 7u - 8 = 0, where u = 3x + 2 u2 + 70 - 8 = 0, where u = 7(3x + 2) lu² +4-8=0 what’s the answer?

For this case we can make a change of variable, to obtain a quadratic equation of the form:

Making the change:

Substituting the change we have:

Thus, the correct option is:where

Option B

second option:

Step-by-step explanation:

We have the equation given:

We can replace the variable in the quardatic equation.

So,

Putting u in place of 3x+2 will give us:

So the answer is:

So, the second option is correct ..

146%

step-by-step explanation:

a) one student is chosen from classroom a, then a student is chosen from classroom b.  

step-by-step explanation:

independent events are ones in which the probability of one event does not affect the probability of the second event.

one student is chosen from classroom a; this does not affect the chances of choosing a student from classroom b.   this makes these independent events.

when one card is chosen from a standard deck and then set aside before a second card is chosen, the probability of the second card being chosen changes.   this makes them dependent events.

when one student is chosen from classroom a and then a second student is chosen from classroom a, the probability of choosing the second student changes.   this makes them dependent events.

when a letter is chosen from the alphabet and then a second letter is chosen, the probability of choosing the second letter changes.   this makes them dependent events.