Answer:
The y-intercept is -2 and the equation is y=x-2
Step-by-step explanation:
-That's where the line crosses the y axis.
-The equation is y= x -2 because it has a rise/run of 1/1 which is just 1 and the y intercept is -2
( I'm so sorry I totally missed the second part of the question lol)
Answer:
0.0094.
Step-by-step explanation:
For the given experiment, let X be the lifetimes of parts manufactured from a certain aluminum alloy.
sample size =73
Sample mean = 784
Sample standard deviation = 120
Let µ represent the mean number of kilocycles to failure for parts of this type.
Null hypothesis, H0 : µ ≤ 750
Alternative hypothesis, H1 : µ > 750.

where,
is sample mean.
is population mean.
s is sample standard deviation.
n is the sample size.


It is a right tailed test because alternative hypothesis is µ > 750. So, P-value is the probability of observing a sample mean greater that 783 or the probability of P(z>2.35).




Therefore the P-value is 0.0094.
Answer:
AB = AD = 22 units
Explanation:
1- solving for r:
We are given that:
AD is congruent to AB
This means that:
AD = AB
2r + 8 = 5r - 13
5r - 2r = 8 + 13
3r = 21
r = 21/3
r = 7
2- getting the value of AB:
Since we calculated the value of r, we can simply substitute in the equation to get AB as follows:
AB = AD = 5(7)-13 = 2(7)+8 = 22 units
Hope this helps :)