Answer:
1 He spent 9 hours working
2. Her balance before she bought groceries is 83 + 294 = $ 377
3.He spent 16 × 3 = 48 minutes on his math homework.
4. Garden view hotel is 235 in height
Explanation:
1. Sam spent 2/5 of his work day answering mail. He spent 3.6 hours answering email yesterday . To calculate how many hours he work let make the hours he worked yesterday = a
time he spent answering email
2/5 × a = 3.6
cross multiply
3.6 × 5 = 2a
18 = 2a
divide both sides by 2
a = 18/2
a = 9 hours
2. Elena was charged $ 83 from her credit card to buy groceries. Her final balance after buying groceries was $ 294. Her balance before she bought groceries is 83 + 294 = $ 377
3. Let say he spent a minutes long on science homework.
Time he spent on math homework = 3a
He spent a total of 64 minutes on math and sciences
3a + a = 64
4a =64
a = 64/4
a = 16
He spent 16 × 3 = 48 minutes on his math homework.
4.Let the plaza hotel height = a
garden view hotel height = b
2a - b = 17.........(i)
a + b = 361........(ii)
b = 361 - a
2a - (361 - a) = 17
2a - 361 + a = 17
3a = 17 + 361
3a = 378
divide both sides by 3
a = 378/3
a = 126
insertthe value of a in equation (ii)
a + b = 361........(ii)
126 + b = 361
b = 361 -126
b = 235