Answer: x = 5, y = 2/5
Step-by-step explanation:
We have the system of equations:
6*x + 5*y = 32
2*x + 5*y = 12
To solve it, we can start by isolating one of the variables in one of the equations.
Because in both of them we have the term 5*y, i will isolate 5*y in the second equation:
5*y = 12 - 2*x
Now let's replace it in the first equation:
6*x + (12 - 2*x) = 32
Now let's solve it for x
6*x + 12 - 2*x = 32
(6*x - 2*x) = 32 - 12 = 20
4*x = 20
x = 20/4 = 5
Now we know the value of x, we can replace it in the equation:
5*y = 12 - 2*x
to find the value of y.
5*y = 12 - 2*5
5*y = 2
y = 2/5
Then the solution of the system is x = 5, y = 2/5
Answer:
2) Decreases as the habitat is increasingly polluted
Step-by-step explanation:
number 1 make no sense. 3; at the start, say the population is x. but taking into account the pesticide, it cant no longer ramain the same (pesticide kills some of the x) . 4; similar to the case for answer 3
Answer:
A runner ran 20 miles in 150 minutes. If she runs at that speed,
Step-by-step explanation:
3x-12 ≥7x+4
Subtract 3x from both sides
-12 ≥4x+4
Subtract 4 from both sides
-16 ≥4x
Divide each side by 4
-4 ≥x
From point 4, you use a closed circle and the arrow is facing towards 0
Answer:
1/2
Step-by-step explanation:
Simple probability is a ratio of the number of ways the thing we want to happen can to the total possible outcomes.
(For example, we flip a coin and want heads, but it can land on heads or tails. Our probability of getting heads is 1/2, one way to get heads over the 2 possible outcomes)
So for this problem, there's 20 possible things that CAN happen (3 + 7 + 10) and 10 ways we get what we want (a green marble).
Our probability of getting a green marble is 
, which simplifies to 
