Answer:
60,000 i think
Step-by-step explanation:
Let x be the amount (in oz) of pure silver used in this alloy. Each ounce of the pure silver contributes a value of $30.48, so that the total cost of the amount of pure silver that gets used is $30.48x.
The same goes for the secondary alloy, where each ounce costs $21.35, so that 52 ounces of the alloy contributes a total cost of $21.35*52.
The final alloy has a total mass of (x + 52) ounces, and each ounce costs $24.76, so that this alloy's totat cost is $24.76*(x + 52).
So we have
30.48x + 21.35*52 = 24.76*(x + 52)
30.48x + 1110.20 = 24.76x + 1287.52
5.72x = 177.32
=> x = 31
Answer:
Calculate the determinant. Calculate the matrix of cofactors. Transpose the matrix of cofactors to obtain the adjugate matrix. Divide each entry of the adjugate matrix by the determinant to obtain the inverse.
Answer:
Step-by-step explanation:
Let
x------> the number of years
we know that
Solve for x