Heather was asked to find the density of a break given the mass in kilograms in the dimensions of the brick and meters she wrote her answer 2400 kg/m² on the chalkboard without even performing the calculations first Jonathan knew right away that that her answer was incorrect how could he tell there was an error

9. (y^-5)^10y^10 a. y^-60 b. y^60 c. y^-150 d. y^150 find the simplified form of each expression. 10. (4/7^5)^2 a.8/14^10 b.16/49^25 c.16/49y^10 d.8/14y^25 11. determine if the number 3.43 times 10^-6 is written in scientific notation. if not, explain. a. yes; the number is written scientific notation. b. no; the first factor is not a number between 1 and 10. c. no; it is not written as a number times a power of 10

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.

X+y=-4 x-y=2 use elimination with adding and subtraction