Question

1. (number system) the table below shows the weekly change in the price of 1 gram of gold for 4 weeks. by how much did the price of 1 gram of gold change from the beginning of week 1 to the end of week 4? one gram of gold | week | weekly change in the price (dollars) | |---|---| | 1 | +1.25 | | 2 | -3.125 | | 3 | +0.625 | | 4 | +1.5 |

Explanation:

Step1: Sum weekly changes

$1.25 - 3.125 + 0.625 + 1.5$

Step2: Calculate the result

$1.25 - 3.125 = -1.875$; $-1.875 + 0.625 = -1.25$; $-1.25 + 1.5 = 0.25$

Answer:

0.25 dollars