Mathematics
Grade-7
Easy

Question

In the expression below  the "d" labeled as?
4d-9

  1. Dirt
  2. Donuts
  3. Variable
  4. Constant 

hintHint:

The value of d can vary

The correct answer is: Variable


    In the expression 4d – 9 “d" labeled as variable.

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    Robin charges his tenants $400 each month to rent his houses plus $600 security deposit. In the new year, the property taxes increased on the area where he rents, so as a result, he must increase the rate of change by $25 to ensure his profits are not harmed. The equation best represents how much his tenants will now have to pay is

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    Robin charges his tenants $400 each month to rent his houses plus $600 security deposit. In the new year, the property taxes increased on the area where he rents, so as a result, he must increase the rate of change by $25 to ensure his profits are not harmed. The equation best represents how much his tenants will now have to pay is

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    Given That :
    Rent paid by tenants per month= 400 dollars
    Total security deposit per month= 600 dollars
    let, there exists x tenants in the house belongs to the owner.
    Rate of change made by owner = 25 dollars.
    Now, Amount that should be paid by one tenant =  425 dollars.
    Amount that should be paid by x tenants   = 425x dollars
    Then, total amount paid by the x tenant = y = 425x + 600
    The final equation is  y = 425x + 600 

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