23-11=12
She spent $12 on notebooks, and she bought six notebooks.
12/6=2
Each notebook costed $2.
5) w/8 =11+5 → w/8=16
w=16÷8=2
6)a/-2 -6=1
a/-2=7
a=7×-2=-14
7)k/2=22
k=44
Answer:
603.35%
Step-by-step explanation:
Given that a book costs $ 1.49 and is sold in a retail store for $ 8.99, to determine what is the percentage in mark up, the following calculation must be performed:
1.49 = 100
8.99 = X
8.99 x 100 / 1.49 = X
899 / 1.49 = X
603.35 = X
Thus, the mark up percentage of the book is 603.35%, which implies an increase of more than 6 times its initial value.
Answer:
4.038
Step-by-step explanation:
The simple regression model is:
, then 
.
The statistic calculated for the hypothesis test of statistical significance, for the slope, in a simple regression model is given by:
with 
the slope estimator, 
the value of slope in the null hypothesis and 
the standard error of the slope. Thus,
