Fill in the blank. When determining whether there is a correlation between two variables, one should use a to explore the data visually. When determining whether there is a correlation between two variables, one should use a to explore the data visually. probability distribution protractor scatterplot correlation coefficient

If \( 5^{n+3}=1 \)

f) \( \left(\frac{3}{4}+7,5-\frac{5}{2}+0,25\right) \cdot\left(-\frac{1}{2}+4,3+\frac{3}{2}+\frac{7}{10}\right) \)

Solve the system of equations by substitution. \( \begin{array}{l}-3 x-2 y-z=-1 \\ 2 x+y+3 z=-10 \\ y=-3\end{array} \)

b. In triangle \( A B C \), with side of length \( a \) opposite angle \( A \) etc, find \( a \) if \( A=0.9 \), \( B=0.7 \) and \( b=50.5 \mathrm{~cm} \).

\( \lim _{x \rightarrow-2}([[x]]+[[-x]])=( \) where \( [[\cdot]] \) is the greatest integer function \( ) \)