Answer:
Step-by-step explanation:
Good at what?
Answer: 40 %
Step-by-step explanation:
Let the amount of one card = x
Hence, the value of 20 cards ( Principal amount ) = 20x
And, the value of 22 cards ( Total amount after 3 month ) = 22x
⇒ Total interest in 3 month = 22x - 20x =2x
Let the annual interest rate = r %
( By the formula of simple interest rate )




Hence, the annual rate of interest = 40%
Answer:
+25;+18;-10
Step-by-step explanation:
Ok so let's break down the scenario step by step:
- His uncle gave him $25 so that means it's positive so <em>+</em><em>25</em><em> </em>
- Now he earned $18 so that means it is also positive so <em>+</em><em>18</em>
- And now he spent $10 which means it is negative so <em>-</em><em> </em><em>10</em>
(And of you want to find out the amount left with him,
(25+18)-10
=43-10
=$33)
Hope this helps :)
Step-by-step explanation:
crossmultiply and divide both sides by the co efficient of x