Answer:
7 squared is 49, 9 cubed is 729 im not sure what the third one is
Step-by-step explanation:
7x7= 49
9x9x9=729
19 with that symbol usually means degrees like temperature
<u>Answer:</u>
The y-intercept of a line that has a slope of negative 3 and passes through point 0 and -7 is ![y = -3x -7](https://tex.z-dn.net/?f=y%20%3D%20-3x%20-7)
<u>Solution:</u>
Let us assume that the slope is m and the y intercept of the line is b
Hence,
--------- (i)
y intercept means we need to find the value of y when x is 0
Here the line passes through point (0,-7) and slope m = (-3)
Now putting the point (0,-7) in equation (i) we get,
![\Rightarrow -7 = m\times0 +b](https://tex.z-dn.net/?f=%5CRightarrow%20-7%20%3D%20m%5Ctimes0%20%2Bb)
Anything multiplied by 0 is 0,
![\Rightarrow -7 = 0+b](https://tex.z-dn.net/?f=%5CRightarrow%20-7%20%3D%200%2Bb)
![\Rightarrow b = -7](https://tex.z-dn.net/?f=%5CRightarrow%20b%20%3D%20-7)
So, the line will be ![y = -3x -7](https://tex.z-dn.net/?f=y%20%3D%20-3x%20-7)