We will first calculate the total cost in pounds then convert to dollars.
1- Equipment for three offices. The cost is 100 pounds per equipment.
Total cost of equipment = 3*100 = 300 pounds ..........> I
2- One switchboard. The cost is 333 pounds.
Total cost of switchboard = 333 pounds ...............> II
3- Total cost excluding taxes can be calculated by adding I and II as follows:
Cost excluding taxes = 300 + 333 = 633 pounds
4- Tax is 10% of the cost.
Tax amount = 0.1 * 633 = 63.3 pounds
5- Total cost including taxes = 633 + 63.3 = 696.3 pounds
6- Convert the cost to dollars.
We know that 1 pound is equivalent to 1.5$. To know the equivalence of 696.3 pounds, just do cross multiplication as follows:
Cost in dollars = (696.3*1.5) / 1 = 1044.45$
Alright! From the start, each number is being divided by 10. Or, in simple terms, the decimal is moving one to the left each time:
547 → 54.7 → 5.47 → 0.547
Now, you have to keep moving the decimal one to the left. To do that, you have to fill in a zero each time. So the next two terms would be as follows:
.547 → .0547 → .00547
Since all of the variables are y^3, all we have to do is the addition and subtraction of the whole numbers...
2y^3 - 3y^3 + 3y^3 - 4y^3 =
-2y^3
***Notice that the -3y^3 and 3y^3 just cancel out so all you have to do is the
2-4 = -2
Piece of cake :)
The answer is 1,100
i hope this help
