I need help! I will give brainliest, if correct! For a certain value of $k$, the system

\begin{align*}

x + y + 3z &= 10, \\

-4x + 3y + 5z &= 7, \\

kx + z &= 3

\end{align*}has no solutions. What is this value of $k$?

Acircular city park has a sidewalk directly through the middle that is 111 - feet long. if each bag of fertilizer covers 50 square feet, then determine how many bags of fertilizers the parks and recreation department needs to use to cover the circular park. ignore all the sidewalks around and through the park.

Complete the steps, which describe how to find the area of the shaded portion of the circle. find the area of the sector by multiplying the area of the circle by the ratio of the to 360. subtract the area of the triangle from the area of the sector.

Which expression demonstrates the use of the commutative property of addition in the first step of simplifying the expression (-1+i)+(21+5i)+0