Answer:
x=2, y=1
Step-by-step explanation:
2x + y = 5
5x − 2y = 8.
Multiply the first equation by 2
2( 2x + y) = 5*2
4x +2y = 10
Add this to the 2nd equation to eliminate y
4x+2y = 10
5x -2y = 8
--------------------
9x = 18
Divide by 9
9x/9 = 18/9
x = 2
Now find y
2x+y = 5
2(2)+y = 5
4+y = 5
Subtract 4 from each side
y = 5-4
y =1
Answer:
4+√55= 11.42
4-√55= -3.42
Step-by-step explanation:
- w² − 8w − 39 = 0
- w²- 2*4w + 16- 55=0
- (w-4)²=55
- w-4=√55 ⇒ w= 4+√55= 11.42
- w-4=- √55 ⇒ w= 4-√55= -3.42
Answer:
Step-by-step explanation:
The mean for all students is
[102(68.5) + 85(72.4)] / (102 + 85) = (6,987 + 6,154) / 187 = 70.27272727...
So YES the class average was a pass, but just barely.
<span>5.5 cups hopes that helps you</span>
3x-5=13
Move -5 to the right side and change the sign
3x=13+5
Add 13+5
3x=18
Divide both sides by 3
X=6
