Answer:
Suppose the cost price of an article is increased by $ 0.4. What will be the marked price of the article ?
Solution :
Consider the cost price of the article is x,
Mark up = $ 0.4,
Therefore, the marked price( say y ) = cost price + mark up
![\implies y = x + 0.4](https://tex.z-dn.net/?f=%5Cimplies%20y%20%3D%20x%20%2B%200.4)
Which is the required equation.
Answer:
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Step-by-step explanation:
So when you have something like 'split up £54 in ratio 4:5', it really just means split £54 into 4 parts and 5 parts. But we can't do that without working out 1 part.
So the way to find 1 part is to add up all the parts (4 + 5) and divide 54 by that number.
So 4 + 5 is 9, and 54 divided by 9 is 6.
So if 1 part is 6, that means 4 parts is 4 times 6, which is 24.
Equally, if 1 part is 6, 5 parts is 5 times 6, which is 30.
Therefore, £54 split up in a ratio of 4:5 is 24:30.
Answer:
Solution set = {25}
Step-by-step explanation:
=> ![-\sqrt{x} =5](https://tex.z-dn.net/?f=-%5Csqrt%7Bx%7D%20%3D5)
Dividing both sides by -1
=> ![\sqrt{x} = -5](https://tex.z-dn.net/?f=%5Csqrt%7Bx%7D%20%3D%20-5)
Taking square on both sides
=> x = 25
<em><u>Solution set = {25}</u></em>