Can someone explain to me exactly how to do these homework problems? I have a te
ID: 2964800 • Letter: C
Question
Can someone explain to me exactly how to do these homework problems? I have a test coming up with questions similar to these. Thank you so much in advance, will reward well.
Express the situation as a system of two equations in two variables. Be sure to state clearly the meaning of your x- and y-variables. Solve the system by row-reducing the corresponding augmented matrix. State your final answer in terms of the original question. A corn and soybean commodities speculator invested $21,000 yesterday with twice as much in soybean futures as in corn futures. How much did she invest in each? Express the situation as a system of two equations in two variables. Be sure to state clearly the meaning of your x- and y-variables. Solve the system by row-reducing the corresponding augmented matrix. State your final answer in terms of the original question. For the final days before the election, the campaign manager has a total of $34,500 to spend on TV and radio campaign advertisements. Each TV ad costs $3000 and is seen by 10,000 voters, while each radio ad costs $500 and is heard by 2000 voters. Ignoring repeated exposures to the same voter, how many TV and radio ads will contact 124,000 voters using the allocated funds?Explanation / Answer
1.
x-2y = 0
x+y = 21000,augmented matrix is
[1 -2 | 0
1 1 | 21000]
R2 ->R2-R1
[1 -2 | 0
0 3 | 21000]
=>
y = 7000,
x = 14000