a movie star, unwilling to give up his age, posed the following blaw blaw blaw...seven years ago, i was eleven times as old as my daughter. now i am four time as old as she is. How old is this star?
Please help me, you can check my question history and see this is like my first homework question. Please show the steps, so I can look over it and understand it. THANK YOU! :-)
2006-10-26 16:48:03 · 7 answers · asked by dodgersh8r 2 in Education & Reference ➔ Homework Help
A = 4D = 11D - 70
A - 7 = 11(D-7)
7 D = 70
D = 10
A = 40
2006-10-26 16:52:23 · answer #1 · answered by feanor 7 · 0⤊ 0⤋
Let the age of the daughter be x. The star's age now is 4x
The daughter's age 7 years ago would be x-7 and the star's age would be 11(x-7): eleven times the daughter's age seven years ago. Solve for x.
x-7=11(x-7)
x-7=11x-77
10x=77
x=10
The daughter's age now is 10, which makes the star's age 40. Seven years ago the daughter would be 3 and the star 33.
2006-10-26 17:00:45 · answer #2 · answered by gpwarren98 3 · 0⤊ 0⤋
The star is 40. When his daughter was 3 that made him 33 which makes him 11 times older.
Now seven years later the star is 40 and his daughter is 10 so that makes him 4 times older.
2006-10-26 17:28:38 · answer #3 · answered by john s 1 · 0⤊ 0⤋
The little was 3, seven years ago (equaling 33 as the actor's age; 3x11 ). Now the girl is ten and the actor is 40 (33+7=40 and 40/4= 10).
2006-10-26 16:57:45 · answer #4 · answered by sundevil21 2 · 0⤊ 0⤋
Let,the present of the child be x years,Therefore the present age of the star is 4x years.lSeven years ago ,the daughters age was x-7 years and the star's age was 4x-7 years.Therefore,according to the problem, 11(x-7)=4x-7 => 11x-77 =4x-7 =>11x-4x=-7+77 => 7x=70 =>x=70/7=10 years.Therefore,the daughter's present age is 10 years and the movie star's present age is 4X10 or 40 years.
2006-10-26 17:08:05 · answer #5 · answered by alpha 7 · 0⤊ 0⤋
suppose x = age of movie star and y = age of his daughter
seven years ago ( x-7) he was 11y .....so x-7 = 11y (1st equation)
now, x is 4(y+7)..................................so x = 4(y+7) (2nd equation)
(note it is y+7 since the daughter became 7 years older)
substitute the x from the 2nd equation into the 1st so that only the y variable is left:
so x= 4(y+7) into x-7 = 11y
4(y+7) - 7 = 11y
simplify and solve for y:
4y +28 -7 = 11y
21= 7y
21/7 = 7y/7
3 = y
so now we now that his daughter was 3 (7 years ago):
so sub y= 3 into the second equation to solve for x:
x = 4 (y+7)
= 4(3+7)
= 4 (10)
=40
therefore, the movie star is 40 years old.
2006-10-26 17:07:04 · answer #6 · answered by ^_^' 2 · 0⤊ 0⤋
7 years ago :
Star : 33 (11x)
Child : 3 (1x)
Now :
Star : 33 + 7 = 40 (4x)
Child : 3 + 7 = 10 (1x)
2006-10-26 16:53:30 · answer #7 · answered by Zness 1 · 0⤊ 0⤋