Step-by-step explanation:
I HOPE THIS THIS HELPS U.
(x+4)^2
Expanded it is (x+4)(x+4)
To solve you need to distribute.
So x^2 +4x +4x +16
Then combine like terms..
x^2 +8x +16
The total number of marbles is 30+20+50= 100, so. Since there are 20 red marbles and 50 blue marbles. There are 30+50=80. 80/100=4/5= 80%
If x and y are complimentary.....x + y = 90
if x and z are supplementary....x + z = 180
and y + z = 190
x + y = 90.....x = 90 - y
x + z = 180
90 - y + z = 180
z = 180 - 90 + y
z = 90 + y
y + z = 190
y + 90 + y = 190
2y + 90 = 190
2y = 190 - 90
2y = 100
y = 100/2
y = 50 <===
x = 90 - y
x = 90 - 50
x = 40 <===
z = 90 + y
z = 90 + 50
z = 140 <===
z - x - y = 140 - 40 - 50 = 50 <==
