-1/2
To find the slope of the line between two points, we use the equation (y2-y1)/(x2-x1)
Substitute the values given for the xs and ys:
(7-5)/(-1-3)
2/(-4)
simplify: -1/2
The given question can be solve using quadratic formula.
The correct option is (c)
.
Given:
The given equation is,
---------------------------(1)
Write the general quadratic equation.

Write the quadratic formula.
------------------------------- (2)
Compare equation (1) and (2).

Substitute the value of
,
and
in general quadratic.

Subtract
from each side of above equation.

Thus, the correct option is (c)
.
Learn more about quadratic equation here:
brainly.com/question/17177510
Answer: 18:25
Step-by-step explanation:
Tuna : Salmon
180 : 250
18:25
Answer:
A sample of 1032 is needed.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of
, and a confidence level of
, we have the following confidence interval of proportions.

In which
z is the zscore that has a pvalue of
.
The margin of error is:

A sample of 300 components showed that 20 were defective.
This means that 
99% confidence level
So
, z is the value of Z that has a pvalue of
, so
.
How large a sample is needed to estimate the true proportion of defective components to within 2.5 percentage points with 99% confidence?
A sample of n is needed.
n is found when M = 0.025. So






Rounding up
A sample of 1032 is needed.