(d) Using the equation y=20x+500 find the value of x when y is 600. Then, choose the best description of this value of x. x=square Description: The amount (in dollars)in the account after 5 years The number of years it takes for the amount in the account to reach 500 The number of years it takes for the amount in the account to reach 600

To find the value of x when y is 600, we can substitute y = 600 into the equation and solve for x.<br /><br />$y = 20x + 500$<br /><br />$600 = 20x + 500$<br /><br />Subtract 500 from both sides:<br /><br />$100 = 20x$<br /><br />Divide both sides by 20:<br /><br />$x = 5$<br /><br />So, the value of x when y is 600 is 5.<br /><br />Now, let's choose the best description of this value of x.<br /><br />The number of years it takes for the amount in the account to reach $\$ 600$ is the best description for the value of x when y is 600.