WEBVTT 00:00:00.620 --> 00:00:03.820 A local hospital is holding a raffle as a fundraiser. 00:00:03.820 --> 00:00:06.390 The individual cost of participating in the raffle 00:00:06.390 --> 00:00:10.810 is given by the following expression-- 5t plus 3, 00:00:10.810 --> 00:00:14.610 or 5 times t plus 3, where t represents 00:00:14.610 --> 00:00:17.320 the number of tickets someone purchases. 00:00:17.320 --> 00:00:22.330 Evaluate the expression when t is equal to 1, t is equal to 8, 00:00:22.330 --> 00:00:25.790 and t is equal to 10. 00:00:25.790 --> 00:00:27.620 So let's first take the situation 00:00:27.620 --> 00:00:31.530 where t is equal to 1. 00:00:31.530 --> 00:00:33.360 Then this expression right over here 00:00:33.360 --> 00:00:39.750 becomes-- and I'll use that same color-- becomes 5 times 1. 00:00:39.750 --> 00:00:43.680 5 times 1 plus 3. 00:00:43.680 --> 00:00:47.850 5 times 1 plus 3, and we know from order of operations, 00:00:47.850 --> 00:00:50.640 you do the multiplication before you do the addition. 00:00:50.640 --> 00:00:54.870 So this will be 5 times 1 is 5 plus 3, 00:00:54.870 --> 00:00:59.300 and then this is clearly equal to 8. 00:00:59.300 --> 00:01:02.360 Now let's do it when t is equal to 8. 00:01:02.360 --> 00:01:07.300 So when t is equal to 8, this expression becomes-- 00:01:07.300 --> 00:01:16.990 and I'll do the same colors again-- 5 times 8 plus 3. 00:01:16.990 --> 00:01:19.690 Same color of green. 00:01:19.690 --> 00:01:25.650 And once again, 5 times 8 is 40, and then we have the plus 3, 00:01:25.650 --> 00:01:28.730 there so this is equal to 43. 00:01:28.730 --> 00:01:30.270 And so we have the last situation, 00:01:30.270 --> 00:01:31.900 with t is equal to 10. 00:01:31.900 --> 00:01:34.440 I'll do that in blue. 00:01:34.440 --> 00:01:36.660 So we have 5 times 10. 00:01:36.660 --> 00:01:41.670 So 5t is 5 times 10. 00:01:41.670 --> 00:01:43.330 Instead of a t, put a 10 there. 00:01:43.330 --> 00:01:47.249 5 times 10 plus 3. 00:01:47.249 --> 00:01:49.040 That's a slightly different shade of green, 00:01:49.040 --> 00:01:50.248 but I think you get the idea. 00:01:50.248 --> 00:01:52.970 5 times 10 is 50. 00:01:52.970 --> 00:01:55.310 We do 50, and then we're going to have to add 3 to that, 00:01:55.310 --> 00:01:58.400 and that is equal to 53. 00:01:58.400 --> 00:02:00.190 And we're done.