<span>D) wind and solar are continuously renewable and fossil fuels take millions of years to be renewed.
There is wind and sun (solar) daily
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Answer: P=8
Step-by-step explanation:
3p-5=19
U turn -5 to +5
Then u add 5 to both sides, -5 and 19
3p-5=19
+5=+5
-5 and +5 cancel each other out so know it’s
3p=24
Because 19 plus 5 is 24
Now u have to get the variable by itself by dividing 3 on both sides of the equal sign 3p and 24
3 and 3 cancel each other out so now you only have p=24 but then 24 divided 3 is 8
I'd suggest using "elimination by addition and subtraction" here, altho' there are other approaches (such as matrices, substitution, etc.).
Note that if you add the 3rd equation to the second, the x terms cancel out, and you are left with the system
- y + 3z = -2
y + z = -2
-----------------
4z = -4, so z = -1.
Next, multiply the 3rd equation by 2: You'll get -2x + 2y + 2z = -2.
Add this result to the first equation. The 2x terms will cancel, leaving you with the system
2y + 2z = -2
y + z = 4
This would be a good time to subst. -1 for z. We then get:
-2y - 2 = -2. Then y must be 0. y = 0.
Now subst. -1 for z and 0 for y in any of the original equations.
For example, x - (-1) + 3(0) = -2, so x + 1 = -2, or x = -3.
Then a tentative solution is (-3, -1, 0).
It's very important that you ensure that this satisfies all 3 of the originale quations.
28 is the coefficient of x and 35 is the constant
