If the matrix is of 2 by 2 then we can find the determinant of the matrix.

Then (ad - bc ) gives you the determinant of the matrix.
For example,

= (2)(-2) - (1)(4)
= - 4 - 4
= -8
7,000lbs x 1=3.5 tons. 3.5 tons is 7,000lbs.
He made $ 394.90 because you need to add all the large paintings then the small ones then add them all
<h3> Learning task 1</h3>
1. <u> </u><u> </u><u>3</u><u>.</u><u> </u><u> </u> 3. <u> </u><u> </u><u>1</u><u>. </u><u> </u>
4. 2
2. <u> </u><u> </u><u> </u><u>5</u><u>.</u><u> </u> 4. <u> </u><u> </u><u>6</u><u>. </u><u> </u>
9. 13
5. <u> </u><u> </u><u> </u><u>3</u><u>. </u> 6. <u> </u><u> </u><u> </u><u>7</u><u>. </u><u> </u>
5. 9
Step by step explanation:
hopefully that's help