45% ------> $50*.45=$22.50 $50-22.50= $27.50
30%+20% ------ > $50*.30=$15 $50-15=$35 $35*.20=7 $35-7=$28
Answer:
um I don't know sorry
Step-by-step explanation:
Answer:
6.28 mm
Step-by-step explanation:
We have been given the diameter of circle shape necklace
![Radius=\frac{diameter}{2}](https://tex.z-dn.net/?f=Radius%3D%5Cfrac%7Bdiameter%7D%7B2%7D)
![Radius=\frac{4}{2}=2](https://tex.z-dn.net/?f=Radius%3D%5Cfrac%7B4%7D%7B2%7D%3D2)
So, the radius of circle shape necklace is 2mm
Using the formula for circumference which is:![2\pi\cdot r](https://tex.z-dn.net/?f=2%5Cpi%5Ccdot%20r)
Circumference of necklace of circle shaped is:
![2\cdot3.14\cdot2](https://tex.z-dn.net/?f=2%5Ccdot3.14%5Ccdot2)
![\Rightarrow 12.56mm](https://tex.z-dn.net/?f=%5CRightarrow%2012.56mm)
And as we are given that the circumference of of the earrings is one-half the circumference of the necklace.
Hence, the the circumference of the circle-shaped part of one of the earrings:
![\frac{1}{2}\cdot 12.56](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D%5Ccdot%2012.56)
![\Rightarrow 6.28](https://tex.z-dn.net/?f=%5CRightarrow%206.28)
Answer:
B
Step-by-step explanation:
please tell me if I'm wrong
I'd do this in reverse order. Mult. each of the 3 terms inside parentheses by 4:
8k^2 - 28k + 12