Write the system of equations: (2 of them) There are 30 coins, all nickels and dimes, are worth $2.60. How many nickels and dimes are there?

Show your work:

step-by-step explanation:

use pothagarean therom

a^2+b^2=c^2 so first ac

acm is a right triangle because c= 90°

and am (the hypotenuse or c) =16+9 =25

but there is not enough info we need another angle or side length

answer: i think one of the answer is $150 and $300?

step-by-step explanation:

step-by-step explanation:

for the free

the one below it is a function