Earth: radius = 6378 kilometer, diameter = 12756 kilometers.
Answer:
Step-by-step explanation:
9514 1404 393
Answer:
(x, y) = (-2.5, -4)
Step-by-step explanation:
Since you are given an expression for y, it is convenient to substitute that into the second equation.
2x -3(6x +11) = 7
2x -18x -33 = 7
-16x = 40 . . . . . . add 33
x = -40/16 = -2.5
Using the equation for y, we find ...
y = 6(-2.5) +11 = -15 +11 = -4
The solution is (x, y) = (-2.5, -4).
We must use the distributive property for the middle part.
After we do that, the equation can be displayed as 2p + 4 + 5p - 5 + p + 7
Combine like terms
8p + 4 - 5 + 7
Add 4 and 7
8p + 11 - 5
Subtract 5
8p + 6
The simplified version of 2p + 4 + 5(p - 1) + p + 7 = 8p + 6