It will take Alexis 5 weeks. If she starts off with $50, she will still need $150. Then, she earns $30 each week every week. Making $30 for 5 weeks will get Alexis to $150, because 30×5 is 150. Then once you add in the money she started with you will get $200. $150+$50=$200.

8 0

3 years ago

What’s the correct answer

Julli [10]

$A=\left[\begin{array}{ccc}-1\\4\\4\end{array}\right] \\\\F=\left[\begin{array}{ccc}0&-2\end{array}\right] \\\\A\cdot F=\left[\begin{array}{ccc}-1\\4\\4\end{array}\right] \cdot\left[\begin{array}{ccc}0&-2\end{array}\right] =\left[\begin{array}{ccc}(-1)(0)&(-1)(-2)\\(4)(0)&(4)(-2)\\(4)(0)&(4)(-2)\end{array}\right]\\\\=\left[\begin{array}{ccc}0&2\\0&-8\\0&-8\end{array}\right]$