To find the x intercept, plug zero in for y and solve.
To find the y intercept, plug zero in for x and solve.
6(0) + 7y = -4
y = -4/7
(0, -4/7)
6x +7(0) = -4
6x = -4
x = -4/6 = -2/3
(-2/3, 0)
Answer:
We are given that Among 180 homes in Hyde Park, 25 were found to have unsafe radon levels. Among 230 homes in La Grange, 50 were found to have unsafe radon levels.
Claim : the two towns have different rates of unsafe radon levels.
Let and be the rates of unsafe radon levels of Hyde Park and LaGrange respectively .
Among 180 homes in Hyde Park, 25 were found to have unsafe radon levels
So,
Among 230 homes in La Grange, 50 were found to have unsafe radon levels.
So,
We will use Comparing Two Proportions
Formula of test statistic :
Substitute the values
test statistic :
test statistic : −2.053
Refer the z table for p value
p value = 0.0202
α= 0.05
Since p value < α
So, we reject the null hypothesis that the two towns have same rates of unsafe radon levels.
So, Claim is true.
The directions are fairly straightforward. They are asking you to plot the two curves on a graph and find the coordinates of the point of intersection.
After 7 years, the number of birds of each species during that year will be 140.
-28i^2+76i-40 you are welcome
Answer:
D. The 4th choice.
Step-by-step explanation:
We can see from the graph that the point (-2, -5) is excluded from the line since there is there an open circle.
The domain is all real numbers except -2.
The range is all real numbers except -5.