George has 16 coins in his pocket. he has both dimes and quarters. if he has $2.20 in his pocket, how many of each coin does he have

Let's assume

number of dimes in coin as 'd'

number of quarters in coin as 'q'

we are given

total number of coins is 16

so, we get

we know that

1 dime =$0.10

1 quarter=$0.25

we have

he has $2.20 in his pocket

so, we get equation as

so, we get system of equation as

Firstly, we will solve for q from first equation

now, we can plug back q

now, we can solve for d

now, we can solve for q

so,

number of dimes coins are 12

number of quarter coins are 4...........Answer

-4

step-by-step explanation:

(-4+8)=-(4-8)=-8+4=-4

12

step-by-step explanation:

12 + 5 = 17

12x2=24

24-7=17