Answer: D
Step-by-step explanation: the answer is d because it can be simplified more
Answer:
27
Step-by-step explanation:
68 + (-41) = ?
Well, adding a negative is the same as subtracting a positive, so...
68 + (-41) = 68 - 41
68 - 41 = 27
Answer:
the opposite number is going to be negative because if x is to the right of the number line then the opposite will be of the left of 0 making the opposite number negative.
Step-by-step explanation:
pls mark brainly i need to lvl up :)
Answer:
i dont know toooo pls answer it fast......................................
Step-by-step explanation:
i need it..........................
Answer:
y = 0
Step-by-step explanation:
It is always a good idea to look at the question and make some observations about it. Here, you might observe ...
- all of the bases are powers of 3: 243 = 3^5; 9 = 3^2
- y is a factor of every exponent
The latter observation is important, because it means that when y=0, every exponential expression has a value of 1. Hence y = 0 is a solution.
__
To solve the equation, you can write it in terms of powers of 3.
(3^5)^(-y) = (3^-5)^(3y)·(3^2)^(-2y)
3^(-5y) = 3^(-15y)·3^(-4y)
3^(-5y) = 3^(-19y)
-5y = -19y . . . . . . . . equating exponents; equivalent to taking log base 3
14y = 0 . . . . . . . . . . add 19y
y = 0 . . . . . . . . . . . one solution
______
The rules of exponents we used are ...
(a^b)(a^c) = a^(b+c)
(a^b)^c = a^(bc)
1/a^b = a^-b
