Answer:
you have to add all of them first
Step-by-step explanation:
Answer:
B D E
Step-by-step explanation:
Y=16 x=20
put these values into the equation and see if it's right or wrong
A) 16 ≠20*20 wrong
B) 16 ≠ (5/4)*20 - wrong
C) 16=(4/5)*20 - right
D) 16≠0.6*20
Answer: C) y=4/5*x
17. (a) The formula with CP subject is ![CP=\frac{SP}{1.1}](https://tex.z-dn.net/?f=CP%3D%5Cfrac%7BSP%7D%7B1.1%7D)
(b) The Cost Price of item without GST is $59.50
(c) The GST of item is $5.95
Step-by-step explanation:
Given formula is;
SP = 1.1 * CP
SP = Selling price
CP = Cost price
(a) Rearrange the formula to make CP the subject;
SP = 1.1 * CP
Dividing both sides by 1.1
![\frac{SP}{1.1}=\frac{1.1*CP}{1.1}\\\\\frac{SP}{1.1}=CP\\\\CP=\frac{SP}{1.1}](https://tex.z-dn.net/?f=%5Cfrac%7BSP%7D%7B1.1%7D%3D%5Cfrac%7B1.1%2ACP%7D%7B1.1%7D%5C%5C%5C%5C%5Cfrac%7BSP%7D%7B1.1%7D%3DCP%5C%5C%5C%5CCP%3D%5Cfrac%7BSP%7D%7B1.1%7D)
The formula with CP subject is ![CP=\frac{SP}{1.1}](https://tex.z-dn.net/?f=CP%3D%5Cfrac%7BSP%7D%7B1.1%7D)
(b) Use your formula from (a) to find the Cost Price of an item without GST if the selling price is $65.45
SP = $65.45
![CP=\frac{65.45}{1.1}\\\\CP=\$59.50](https://tex.z-dn.net/?f=CP%3D%5Cfrac%7B65.45%7D%7B1.1%7D%5C%5C%5C%5CCP%3D%5C%2459.50)
The Cost Price of item without GST is $59.50
(c) Calculate the amount of GST on an item whose selling price is $65.45.
GST = 10% of CP
GST = ![\frac{10}{100}*CP](https://tex.z-dn.net/?f=%5Cfrac%7B10%7D%7B100%7D%2ACP)
GST = 0.1CP
From part (b)
CP = $59.50
GST = 0.1 * 59.50
GST = $5.95
The GST of item is $5.95
Keywords: percentage, multiplication
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