Answer:
468
Step-by-step explanation:
did the test on k12 :)
Answer:
The value of the test statistic is 
Step-by-step explanation:
The test statistic is:
In which X is the sample mean, 
is the value tested at the null hypothesis, 
is the standard deviation and n is the size of the sample.
Test if the mean is equal to 5:
This means that the null hypothesis is 
A simple random sample of wrist breadths of 40 women has a mean of 5.07 cm. The population standard deviation is 0.33 cm.
This means that 
Find the value of the test statistic?
The value of the test statistic is
Answer:
150 degrees
Step-by-step explanation:
let x = measure of smaller angle
let 5x = measure of larger angle
larger angle plus smaller angle = 180
5x + x = 180
6x = 180
x = 30°
5(30) = 150°
You're solving a system here, easy peasy. Solve the second equation for y to get y = 2 - 3x. Now in the first equation, sub in this y value where you see a y and now the equation is in terms of x only: x^2 + (2-3x)^2 = 20. You have to FOIL out the (2-3x)^2 first to get x^2 + 4 - 12x + 9x^2 = 20. Now combine like terms to get 10x^2 - 12x + 4 = 20. Move the 20 over by subtraction to get
10x^2 - 12x - 16 = 0. Factor this now, taking a 2 out first: 2(5x^2 - 6x -8)=0 and you get factors of 2(x-2)(5x+4)=0. x=2 or x = -4/5. If x = 2, then y = -4. If x = -4/5, then y = 22/5
