Answer:
lions=105 elephants=252
Step-by-step explanation:
We know that there is a total of 375 lions and elephants. We also know the ratio of those. With these two we can build an equation that gives us the exact number of each of the two species.
We can multiply the ratio by x:
(5/12)*(x/x)
now we have:
5x/12x
we input these new data into the total number of both animals:
5x+12x=357
17x=357
x=357/17
x=21
remember x is not the number of any of the animals
number of lions is 5x=5*21=105
number of elephants is 12x=12*21=252
Answer:
A
Step-by-step explanation:
When you read the question it says that her average speed from the library to the gym is 15 mph less than her speed from her home to the library. So x - 15 is what describes that situation.
If it is A it cannot be anything else.
B is incorrect. x - 15 is not a time. It is a rate. It can be used to develop the amount of time, but by itself it is still A.
C is incorrect. Her average speed from her house to the library is x
D is incorrect. The distance is given as the same as from her home to the library as from the library to the gym. Both are 4
Answer:
1 or -1 if written
Step-by-step explanation:
Anything to the power of 0 is 1.
if the problem is written -(9x) though it would be negative one because the negative is outside of the parenthesis.
Answer:
b^2-4ac
Step-by-step explanation:
By looking at that part after substituting and calculating, you can tell these things about the solution