Hey there! :D
2x+7-3
The only thing you can simplify is 7 and 3.
7-3= 4
2x+4 <=== simplified expression
I hope this helps!
~kaikers
Answer:
There is evidence to support the claim that there is a linear correlation between the heights and pulse rates of women
Step-by-step explanation:
given that the heights (in inches) and pulse rates (in beats per minute) for a sample of 11 women were measured.
correlation coefficient r = 0.7200

(two tailed test at 5% significance level)
r difference = 0.7200
Std error of r = 
Test statistic t = r difference/std error = 3.1128
df =9
p value=0.012458
since p <alpha, we reject H0
There is evidence to support the claim that there is a linear correlation between the heights and pulse rates of women
We can use Pythagoras to find this out
The length of each string would be :
x^2 = 36^2 + 15^2
x^2 = 1521
x = √1521
= 39
Total length of the string = 39 + 39
= 78 centimeters