To get the value of all the nickels, Sal needs to multiply "n" with the value of nickel = $0. It is also interesting to note that this number is approximately 13 times the amount of US currency in circulation, according to the Treasury bulletin, which lists the amount at $853. If you use substitution method, you solve one of the equations for a single variable. A nickel, in American usage, is a five-cent coin struck by the United States Mint. 10 nickels are going to be $0. Now, we can isolate the n on the left-hand side by subtracting 4 from both sides. If you had $50 billion in $100 bills, the sheer volume of the currency would be just under 20, 000 cubic feet, enough to fill 33. So then we want to take that same proportion, but exactly make it eight inches. I got it right but don't understand how the equations can give 2 different answers. 48 (According to US Treasury Direct, 3/26/09).
And no money due to nickels. And then we know that q is equal to 16 minus n from the first constraint. They are both correct, but only one gives direct answer leaving only one variable. And then we could divide both sides by negative 0. And that is going to be equal to $2. Remember, to find numeric answers, you need to manipulate and add the equations in such a way to eliminate a variable. So it all works out. If one share at current market value of $90, 000 (as of 4/2/09) was converted into $1 bills, the column of cash would rise 32 feet, approximately 3/4 the height of a standard American utility pole (40 ft). So L = 160 and K = 290. After you have done this, if you gathered up the nickels and made one stack of nickels (not edge to edge, but face to face) that reached to the ceiling of the room, 7. So we have the nickels plus the quarters need to be equal to-- well, it tells us we have 16 total coins. This amount would be massive (literally) if handed out in cash, weighing approximately 1, 907 tons when denominated in $100 bills.
5 Olympic-sized swimming pools, with a total volume of 398, 000 cubic feet. If you wanted to cover (as nearly as possible) the floor of a 6-foot by 8-foot room with one thickness of nickels, how many nickels would it take? So that's one equation right there. The mounting US National debt, growing by billions every day, has recently topped the $11 trillion mark. In your 2nd attempt, you added and eliminated "k". As a birthday gift, Zoey gave her niece an electronic piggy bank that displays the total amount of money in the bank as well as the total number of coins. One dollar = 10 dimes. How did u get value of n as 0. If denominated in $1 bills, the cash would stack as high as the tallest building in the world, the 2683. 25 times the negative n. 0.
5 "Super 18" dump trucks to capacity. 05 of something, and I'm going to subtract from that 0. So it's going to be $1. Note: n and q are the numbers of each type of coins. With the potential failure of AIG posing considerable systemic risk, the government has poured a total of approximately $173 billion into the company to avoid disaster. Composed of 75% copper and 25% nickel, the piece has been issued since 1866. If 50 one-cent coins were stacked on top of each other in a column, the column would be approximately 3 7 8 inches tall. So since this first constraint is telling us that q, the number of quarters, must be 16 minus the number of nickels, in the second constraint, every place that we see a q, every place we see quarters, we can replace it with 16 minus n. So let's do that. How would you do it (if it can be done)? So let's define some variables here. Let's let n equal the number of nickels.
2y + 6 - 3y = -3 // -y + 6 = -3. We'', it's going to be the number of nickels plus the number of quarters. One dollar = 4 quarters. American coins are based on portions of a dollar, and the standards are as follows: One dollar = 100 pennies. 8 Olympic swimming pools. Now substitute your x into the second equation: 2 ( y + 3) - 3y = -3. Only some combinations of the number of coins and the total money will produce whole number solutions, and so not all combinations are possible. A quarter is worth 25 cents or $0. Or I could write negative 0. 25 of that something, that'll give me negative 0. So the easiest thing that we could do here, let's solve for q over here. At its maximum flow, water rushes over Niagara Falls at approximately 100, 000 cubic feet per second, according to the Niagara Parks association.
So if we add up the total number of nickels plus the number of quarters, we have 16 coins. If anyone has the patience to read through and understand what I tried to explain, eternal thanks to you! Sal solves a word problem about the number of nickels and quarters in a piggy bank by creating a system of equations and solving it. How would you graph this(2 votes). The substitution forces "k" out of the equation leaving you with a single variable to find.
So that part makes sense. Subject: Mathematics. So we have two equations with two unknowns.
And we are left with, on the left-hand side, negative-- I could just write that is negative 0. So, it would be about 1298-1316 nickels. How is it possible that just rearranging the equations like that changes the end result? For instance, K + L = 450. We're assuming that we have infinite precision on everything. How big, literally, is the National Debt? You then have an equation with a single variable to find. Then we should get eight times fifty over three and seven eighths, and that should equal X.
If consolidated into a single stack of $1 bills, it would measure about 749, 666 miles, which is enough to reach from the earth to the moon twice (at perigee), with a few billion dollars left to spare. How do you embed things like times in the video and hyperlink them so someone can just click and see it? So for this one, we know that we have fifty one cent coins. At this rate, which of the following is closest to the number of one-cent coins it would take to make an 8-inch-tall column?
How do you solve x-y= 3 over 2x- 3y= -3 with substitution. I would have thought that as long as we don't mess up the equality, they both would provide the exact same result. A quick question that came to my head..... How about if she had 17 coins or 19 coins, is it possible that the total price of the 19 coins still be worth 2. So if n plus q is equal to 16, we could subtract n from both sides of this equation. Solve for x in the first equation: x = y + 3. It's not so much that you have different result as the first time you added the equations, you didn't finish the work. Q must be 16 minus n. That is going to be equal to $2. So the total amount of money she has is $0. That is equal to $2. What would the money allocated to the TARP actually look like?
You have to subtract or add Q and N, N and D, and Q and D. Then you solve it similarly to the 2 variable ones. One can only imagine the sound it would make. And then how much total money do we have? In the largest Ponzi scheme in history, Bernard Madoff defrauded thousands of investors for approximately $50 billion. 05n plus-- let's distribute the 0. 25 times negative n is minus 0. So it's however may nickels times $0. 5 feet high, would you have enough nickels? To: 3L - K = 190 (same as second equation, just subtracting K from both sides and having the 3L on the on the left). This is the eliminate method because at the point your add the equations your goal is to eliminate a variable. And what do we do about it when solving future equations?
6 billion as of December 31, 2008. Answer details: Grade: High School. Explanation: A nickel is 5 cents. And then 6 quarters is going to be $1.