How do i solve a word problem using a matrice with these equations:
10x+12y+20z=1240
1.5x+2y+4z=240
1x+1y+1z=70

In matrix form, the system

is

Multiplying through both sides of the second equation by 2 doesn't change the system fundamentally:

Then we can try to find a solution via elimination. Consider the augmented matrix,

Subtract 10(row 1) from row 2, and subtract 3(row 1) from row 3:

Subtract 2(row 2) from row 3:

We end up with a row of 0s, which means the system is underdetermined and dependent, or that it has infinitely many solutions.

22 dimes and 9 nickels

step-by-step explanation:

answer: 140

step-by-step explanation:

so just add all then it will be your answer but i am not pretty sur eif it is but hope this i am here to people