Answer:
x=4, y=1
Step-by-step explanation:
x + 3y = 7
x - 3y = 1
Add the equations together to eliminate y
x + 3y = 7
x - 3y = 1
---------------------
2x = 8
Divide by 2
2x/2 = 8/2
x = 4
Subtract the two equations to eliminate x
x + 3y = 7
-x + 3y = -1
----------------------
6y = 6
Divide by 6
6y/6 = 6/6
y =1
Answer:
Friday
Step-by-step explanation:
There are 55 days between October 31 and December 25.
55%7 = 6 (the remainder of dividing 55 by 7 is 6)
So one day before Saturday, which makes it a Friday.
Answer:
6 1 / 24
Step-by-step explanation:
in 1 hour - 5 / 6 tons of dust
Total dust = 7 1 / 4 = 29 / 4
1 ----- 5 / 6
x ----- 29 / 4
x = (29 / 4 ) * (5 / 6)
x = 145 / 24
x = 6 1 / 24
To complete the square, you can add (and subtract) the square of half the x coefficient.
... y = x² -10x + 30
... y = (x² -10x +25) + (30 -25)
... y = (x -5)² +5
Answer:
(a)3.15,(b)10.1,(c)5.0,(d)6.00,(e)21.8,(f)3.1
