(1 point) Which of the following subsets of {\mathbb R}^{3\times 3} are subspaces of {\mathbb R}^{3\times 3}? A. The diagonal 3\times 3 matrices B. The 3\times 3 matrices with all zeros in the third row C. The non-invertible 3\times 3 matrices D. The symmetric 3\times 3 matrices E. The 3\times 3 matrices whose entries are all greater than or equal to 0 F. The 3\times 3 matrices in reduced row-echelon form

Eight people were asked what the balance of their savings account at the beginning of the month was and how much it increased or decreased by the end of the month. create a scatter plot that represents the data that is shown in the table. the x-axis represents the beginning balance in thousands of dollars and the y-axis represents the change in the savings account in hundreds of dollars. name beginning balance (in thousands of dollars) change in savings account (in hundreds of dollars) jimmy 5 3 kendra 4 7 carlos 5 4 yolanda 3 1 shawn 2 5 laura 3 2 andy 5 6 georgia 4 3

What is the area of the original rectangle? 8 cm² 20 cm² 25 cm² 40 cm²

Will mark ! (10 points also! ) if x varies inversely with y and x =6 when y= 10, find y when x=8 a. y=4.8 b. y=7.5 c. y=40/3 d. y=4/15