You are checking the results of a phone app that counts calories. when someone eats, it is recorded as positive calories. when someone exercises, it is recorded as negative calories. what is the number of net calories for a person with the following record? description calories bike, 30 min −270 breakfast  560 lunch  770 walk, 45 min  −80 dinner  990 ping-pong, 30 min −130 1,840 2,260 2,320 2,380 2,800

Option A. 1840

Step-by-step explanation:

The app recorded as positive calories when someone eats and it is recorded as negative calories when someone exercise.

To calculate the number of net calories for a person we add all the calories

that he ate and then subtract all the calories that he worked out.

Breakfast + Lunch + Dinner = 560 + 770 + 990 = 2320

Bike + walk + ping-pong = 270 + 80 + 130 = 480

Now subtract the exercise from eaten calories

2320 - 480 = 1,840

Option A. 1840 is the answer.

add all the numbers and check the ones place.

the answer is 486. as the ones place is more than 4, the estimation will be the next 10 ie, 490

a; x = 0.5

step-by-step explanation:

-10x = -5

x = 0.5