![darkmatter1210](/avatars/12977.jpg)
darkmatter1210
31.10.2020 •
Mathematics
At the present time a man is four times as old as his son. Six years ago he was 10 times as old. Find their present ages.
Solved
Show answers
More tips
- H Health and Medicine 10 Ways to Cleanse Your Colon and Improve Your Health...
- D Dating, Love, Relationships How to Overcome Jealousy: Tips and Tricks...
- H Health and Medicine Angina: Causes, Symptoms, and Treatment...
- C Computers and Internet How to Learn to Type Fast?...
- F Food and Cooking Delight for Gourmets: How to Prepare Liver Pate...
- S Style and Beauty How to braid friendship bracelets?...
- H Health and Medicine Mercury Thermometer Danger: What to do when a thermometer breaks?...
- F Food and Cooking Which Calamari Salad is the Most Delicious?...
- S Society and Politics 10 Tips for Boosting Your Self-Esteem...
- F Food and Cooking The Most Delicious and Simple Fish in Batter Recipe...
Answers on questions: Mathematics
- M Mathematics Help me please with the picture above and about EQUATIONS WITH VARIABLES ON BOTH SIDES...
- M Mathematics A ship is 50 miles from a lighthouse. The bearing of the lighthouse from the ship is N 30degrees W. The ship travels due East and calculates the bearing to the lighthouse...
- M Mathematics Help me! ........................
- M Mathematics How many unique triangles can be drawn with side lengths 8 in., 12 in., and 24 in.? Explain....
- M Mathematics What number makes 7+n and 7-n equal...
- M Mathematics Find the 12th term of the geometric sequence 2 , − 8 , 32 , . . . 2,−8,32,......
- M Mathematics How many unique triangles can be drawn with given side links of 8 inches in 10.3 inches in 13 inches...
- M Mathematics 1. Graph fx) = 53-x Since 3-x is zero when x=3, we will choose x values around 3 in our table of values. Also, let s graph 5% on the same axes for comparison....
- M Mathematics Which is the correct solution for the system? 3y = 6 − 2 8x = 3y − 1...
- M Mathematics A student answered 134 out of 177 questions correctly on an exam. What percent is this?...
Ответ:
Son = x
Man = 4x
Six years ago:-Son = (x - 6)
Man = (4x - 6)
And, we have also been given a relation between the age of son and man six years ago, that is, six years ago, the age of man was 10 times that of the age of son. Using that relation, we can set up an equation as follows:
(4x - 6) = 10(x - 6)
→ 4x - 6 = 10x - 60
→ 10x - 4x = 60 - 6
→ 6x = 54
→ x = 9
And we have assumed that present age of Son is x years and that of man is 4x years. Hence:
Present age of son = x years = 9 yearsPresent age of man = (4x) years = (4 * 9) years = 36 yearsОтвет:
b = 16
h = 3
A = 16*3
A = 48 square centimenters