Answer:
a) P value = 0.0013
b) No, it is not plausible that the silicon content of the water is no greater than it was 10 years ago
Step-by-step explanation:
The null hypothesis here is “Mean is equal to 5” while alternate hypothesis is that “Mean is greater than 5”
Given
Mean = 5, x’ = 5.4 and sigma = 1.2 and n = 85
Z = x-u’/sigma/sqrt n
Substituting the given values, we get –
Z = 3.02
A) P value = 0.0013 which is less than 0.05 and thus we will reject the null hypothesis
B) There is enough evidence to reject the null hypothesis
Answer:
1/3x - 3
Step-by-step explanation:
To find the inverse, we exchange x and y and then solve for y
y =3x+9
Exchange x and y
x = 3y+9
Then solve for y
Subtract 9 from each side
x-9 =3y+9-9
x-9 = 3y
Divide by 3
1/3(x-9) = 3y/3
1/3(x-9) = y
Distribute
1/3x-3 = y
The inverse is 1/3 x -3
In this case 6 would in the ten thousands place. 4 is in the thousands place.
Answer:
its 76.8
Step-by-step explanation:
Answer:
45 + 3m = 75
Step-by-step explanation:
**You haven't provided the options for the solution in your question**
However, from the information provided, the equation representing the situation is:
45 + 3m = 75
<u>To solve 45 + 3m = 75</u>:
Subtract 45 from both sides: 3m = 30
Divide both sides by 3: m = 10
Therefore he solved 10 math problems.
