You have a collection of 30 coins, all of which are dimes and quarters. The total of your collection is $5.10 how many of each kind of coin do you have

$4

step-by-step explanation:

$30×5=$150

$150 minus $130=$20

$20÷5=$4.

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or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!

7

step-by-step explanation:

i need a diagram

step-by-step explanation:

no