Answer:
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Step-by-step explanation:
D.
(-4v*3v) + (-4v*-5) + (3v*7) + (7*-5)
-12v^2 + 20v + 21v -35
-12v^2 + 41v -35
Answer:
Step-by-step explanation:
the y intercept is 3 and the slope is 3/2
so you go up 3 from the y intercept and 2 to the right
Answer:
Wanda and Dave will catch each other in 54 seconds after Dave starts walking.
Step-by-step explanation:
Let Wanda and Dave catch each other when x be the time after Dave starts walking and y be the distance covered by them
It is given that Wanda started walking along a path 27 seconds before Dave and the constant speed of Wanda is 3 feet per second.
![speed=\frac{distance}{time}](https://tex.z-dn.net/?f=speed%3D%5Cfrac%7Bdistance%7D%7Btime%7D)
![3=\frac{y}{x+27}](https://tex.z-dn.net/?f=3%3D%5Cfrac%7By%7D%7Bx%2B27%7D)
![y=3(x+27)](https://tex.z-dn.net/?f=y%3D3%28x%2B27%29)
.... (1)
The constant speed of Dave is 4.5 feet per second.
![4.5=\frac{y}{x}](https://tex.z-dn.net/?f=4.5%3D%5Cfrac%7By%7D%7Bx%7D)
.... (2)
Equate equation (1) and (2).
![3x+81=4.5x](https://tex.z-dn.net/?f=3x%2B81%3D4.5x)
![81=1.5x](https://tex.z-dn.net/?f=81%3D1.5x)
Divide both sides by 1.5.
![\frac{81}{1.5}=x](https://tex.z-dn.net/?f=%5Cfrac%7B81%7D%7B1.5%7D%3Dx)
![54=x](https://tex.z-dn.net/?f=54%3Dx)
Therefore, Wanda and Dave will catch each other in 54 seconds after Dave starts walking.
Answer:
d = 126, z = 28
Step-by-step explanation:
The angle with the variable is diagonal from the 105 degree angle. In this case, that means that they are equivalent. So, 105+21 = 126. d = 126 :)