Answer:
510 gorillas
Step-by-step explanation:
In this problem, the population of gorillas is decreasing at a rate of 3.5 % per year.
We can write an expression for the population of gorillas as follows:
where
n(t) is the number of gorillas after t years
is the number of gorillas at t = 0
r is the grow rate of the population
t is the number of years
Here we have:
is the number of gorillas when t = 20 years
is the grow rate of the population
So the equation becomes:
And solving for , we find the initial number of gorillas:
Answer:
1. x = 39.67
2. x = 15
3. x = 49.29
4. x = -12.8
5. x = 96
6. x = 42
7. x = 36
8. x = 0
9. x = 78
Step-by-step explanation:
Just remember to always isolate the unknown. Here are the solutions to your problem. I will explain each step for the first for you to give you an idea how the others were worked out.
1.
Add 2 to both sides to get rid of -2 on the left side.
Multiply both sides by 7 to get rid of 7 on the left side.
Divide both sides by 3 to get rid of 3 on the left side.
You could also transpose everything by the x to the other side of the equation. Just remember that whatever OPERATION used on the original side, must be opposite on the other side. I'll use the second problem to show this.
Transpose 1 on the left to the right. It is addition on the left, then it would be subtraction on the other side.
Transpose 5 from the left side to the right. It is division on the left, then it would be multiplication on the right.
Transpose 2 from the left side to the right. It is multiplication on the left, then it would be division on the right.
Let's move on with the rest now.
3.
4.
5.
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8.
9.
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Answer:
y = -7/8x - 3/2
Step-by-step explanation:
If you look at the point where x = 0, you can see that y = -3/2.
That is the y-intercept. In the equation y = mx + b, b is the y-intercept. In this case, b = -3/2
The first choice is the only equation that ends with -3/2, so that is the answer.
Answer:
1 and 5. Can I get a brainliest???
Step-by-step explanation: