R5exS5Elearapb R5exS5Elearapb
  • 03-02-2016
  • Mathematics
contestada

A mother's age is three less than three times her daughter's age. The sum of their ages is 45. What is the daughter's age?
A) 33
B) 12
C) 42
D) 15

Respuesta :

taskmasters
taskmasters taskmasters
  • 03-02-2016
Given:
mother's age = 3x - 3
daughter's age = x
total of their ages = 45

Mother's age + daughter's age = 45
3x - 3 + x = 45
4x = 45 + 3
4x = 48
4x/4 = 48/4
x = 12 daughter's age.  CHOICE B.

mother's age : 3x - 3 = 3(12) - 3 = 36 - 3 = 33

To check:
mother's age + daughter's age = 45
33 + 12 = 45
45 = 45
Answer Link

Otras preguntas

Which of the following is the best example of a command economy? A. European monarchies of the Middle Ages B. Cuba under the leadership of Fidel Castro C. the A
What is the mean absolute deviation for 7, 5, 1, 6, 2, and 3? A. 6 B. 3 C. 2 D. 1
17-2c for c = 7 what is the answer
Roosevelt proposed adding one new justice to the Supreme Court for every judge over this age, the U.S. Senate turned down his proposal. a. 60 c. 70 b. 65 d.
17-2c for c = 7 what is the answer
what is the greatest common factor of 98 and 42?
how to turn 6/3,5/3 & 8/3 into whole fractions
this is relay hard i need help 19 point available
The two bases of a trapezoid are 3 and 11 and the altitude is 8. What is the area of the trapezoid? A. 56 B. 112 C. 64 D. 96
Competition occurs when two or more people or groups work together to achieve a goal that will benefit more than one person. a. True b. False