Okie, hope you a new year!
Y=-4.5 and x=-2
So your first “equation equals to x so then you substitute the X in the second equation with the first equation. Which would give you 3(2y+7)-2y=3 then you solve (make sure to distribute). Which would give you y=-4.5 Can you substitute your y answer in your first equation. Which would be x= 2(-4.5)+7 then your solve
Answer:
52
Step-by-step explanation:
231-23=208
208÷4=52
Answer:
857.766cm^3
Step-by-step explanation:
Given data
Lenght = 3m
Internal radius r = 3m
External radius R= 10m
Volume of pipe= πr^2h
Volume of metal= External - Internal
Volume= πR^2h-πr^2h
Volume= πh(R^2-r^2)
Volume= 3.142*3(10^2-3^2)
Volume= 3.142*3(100-9)
Volume= 9.426*(91)
Volume= 857.766cm^3
Hence the volume of the metal is 857.766cm^3
Answer:
(2,-2)
Step-by-step explanation:
-1(4x + 6y = -4)
4x + 3y = 2
-4x - 6y = 4
4x + 3y = 2
-3y=6
divide it by -3 to get y.
y=-2
4x + 3(-2) = 2
4x - 6 = 2
add 6 to both sides.
4x = 8
divide by 4 to get x.
x=2
(2,-2)
Hope this helps!
