Answer:
Define F as fathers age and S as sons age right now.
Then now they are
(1) 3S = F
and six years ago they were
(2) 5*(S-6) = F-6
calculate 5*(S-6)
5S - 30 = F-6
Subtract left and right side by -F
Add 30 to left and right side
5S - F = 24
Put (2) 3S = F into the equation above
5S - 3S = 24
2S = 24
S = 12
insert result in (2) 3S = F
3*12 = F
36 = F
Step-by-step explanation:
So the son is 12 years, and the father is 36 years.
Answer:
-6x² + 5x + 15
Step-by-step explanation:
Combine like terms. Like terms are terms with the same amount of variables.
Reorder based on descending powers:
-5x² - x² + 7x - 2x + 10 + 5
(-5x² - x²) + (7x - 2x) + (10 + 5)
(-6x²) + (5x) + (15)
-6x² + 5x + 15 is your answer.
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Answer:
Step-by-step explanation:
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Answer:
Mr.A walked a faster rate
Step-by-step explanation:
Mr. A walked a faster rate since he walked 1 3/4 miles in 30 minutes which is 17.14 minutes a mile when dividing 30/1.75. Mr Geiger walked a slower rate 2 miles in 3/4 hours, 45/2 = 22.5 minutes per mile.
-- To change from 100,000 to 10,000 the quantity is reduced by 90,000.
-- 90,000 (the reduction) is 90% of the original 100,000 .
-- So the original quantity is reduced by 90% .
