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What results? What type of exercise are you doing?

You lose weight by diet. Exercise is for health and fitness. It allows you to burn a few more calories, and thus to eat a bit more and still lose weight, but in itself won't lead to a 40 lb. loss. Weight loss happens in the kitchen.

As to fitness, you should start seeing results within a month. The exercises will feel easier and you'll have more energy afterwards.

oliviad1908 wrote: »

I want to lose about 40 pounds and I am doing body blast, combat, total time, 5 times a week

If you have 40 lbs to lose to get to a healthy weight, you should set yourself up to lose 1 lb per week. You may be able to expect 1.5 lbs per week in the beginning. Regardless of what exercise you are doing, your eating will give you more bang for your buck. You need to be in a calorie deficit to lose weight.

These posts should help:

https://community.myfitnesspal.com/en/discussion/1080242/a-guide-to-get-you-started-on-your-path-to-sexypants/p1

https://community.myfitnesspal.com/en/discussion/10084670/it-is-unlikely-that-you-will-lose-weight-consistently-i-e-weight-loss-is-not-linear/p1

https://community.myfitnesspal.com/en/discussion/10503681/exercise-calories-do-i-eat-these-a-video-explanation/p1

oliviad1908 wrote: »

How long do you think it will take to lose 40 pounds

Everyone is different. I started out pretty heavy and have been losing at about 1-1.5 lbs week (faster at the beginning, slower now as I have less to lose) and it's taken me roughly 7.5 months to lose 40 lbs. YMMV.