Answer:
To do this you have to combine like terms. For example, 7x and -5x.
Answer:let
Length =L
Width =W
L=5W
Perimeter(p)=2L+2W
P=10W+2W
84=12W
Divide both sides by 12
W=7m
L=5*7=35m
Hence, the length and width are 35m and 7m respectively
Step-by-step explanation:
Answer:
The marked up percentage is 112.5%
Step-by-step explanation:
The cost price of the emerald pendant = $400
The selling price of the emerald pendant = $840
Now, the Mark up Price = Selling Price - Cost Price
= $840 - $400 = $450
Also, 
= 
⇒ Percentage of Mark up Price = 112.5%
Hence, the marked up percentage is 112.5%
Answer:
Daniella: 0.2
Dwayne: 0.25
Angel: 0.2
Daniella and Angel have the same amount of scores. And Dwayne score is not. Dwayne has a higher score than Daniella and Angel.
Hope this helps
-Amelia