Answer:
The value of an appropriate test statistic for the car dealer to use is -4.
Step-by-step explanation:
The null hypothesis is:
The alternate hypotesis is:
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.
In this problem:
Then
The value of an appropriate test statistic for the car dealer to use is -4.
A right triangle follows the Pythagorean theorem: a^2 + b^2 = c^2
Let’s work out the problems
1. 20^2 + 72^2 = 75^2
40 + 5184 = 5625
False
2. 40^2 + 74^2 = 85^2
1600 + 5476 = 7225
False
3. 45^2 + 60^2 = 75^2
2025 + 3600 = 5625
True
The correct answer is (45, 60, 75)
Answer:
Marla did 64 sit ups each day for one week = (60*7)+(4*7)= 448
Marla did 64 sit ups each day for one week =(50*7)+(14*7)= 448
Marla did 64 sit ups each day for one week =(40*7)+(24*7)= 448
Step-by-step explanation:
Marla did 64 sit ups each day for one week = 64 *7 = 448
A distributive property allows us to multiply a sum by multiplying each addend separately first and then summing the products together.
64 sit ups could be written as 60+4, 50+14 or 40+24.
Apply the distributive property:
Marla did 64 sit ups each day for one week = (60*7)+(4*7)= 448
Marla did 64 sit ups each day for one week =(50*7)+(14*7)= 448
Marla did 64 sit ups each day for one week =(40*7)+(24*7)= 448
We can try any two numbers whose sum is 64 and all will give us the answer 448....
