Answer:
( 9w - 2z)^2
Step-by-step explanation:
81w^2 - 36wz + 4z^2
Rewriting as
(9w)^2 - 2 * 9 w 2z + (2z)^2
We recognize that this is a perfect square binomial
a^2 -2ab + b^2 is a perfect square binomial because it factors to (a - b)^2
let a = 9w b = 2z
81w^2 - 36wz + 4z^2 = ( 9w - 2z)^2
Its right,vertical,and complementary.Hope this helps you a bunch!
Answer:
Step-by-step explanation:
This is simply just simplify you do -2.9 times -3 and c-7 . Once you get that anwser simplify the other side which is pretty easy because there is -1 being multiplied by -4.9=+4.9 and -4.8 then add those up and simplfy your ansers and the last step is division.
Answer: B
Explanation
I believe it’s B because it says when the plane fly with the wind it’s 390miles so if we want to know the speed of the plane In still air it should be 390/x + 10 because we need to consider that the speed of the plane + the speed of wind. While the plane fly at 325 against the wind so it should be 325/x - 10 cuz this time it goes against the wind.
Answer:
B.) Divide by 8 because 8 is a factor of 48.
Step-by-step explanation:
It's true, it's just not a good reason. Sometimes when we divide both sides of an equation by a number everything works out evenly, sometimes it doesn't, but either way it's a step toward the answer, maybe the last step.
