Saturday

April 19, 2014

April 19, 2014

Posted by **Mark** on Wednesday, March 13, 2013 at 2:40am.

- There are five chidren in the Roberts family. Amy and Ariel are twins. Brett and Bart are also twins. Amy's age plus Brett's age is 25years. Ariel's age plus Charlene's age is 27 years . Bart's age plus Charlene's age is 20 years. What is the sum of the ages of all 5 children in the Roberts fanily?

- math problem -
**Reiny**, Wednesday, March 13, 2013 at 7:41amreturn = 5000(1.25) + 5000(.8)

= ...

#2

let Amy and Ariel' age be x

let Brett and Bart's age be y

let Charlene's age be z

x+y = 25

x + z = 27

y+z = 20

2nd minus the third

x - y = 7

add that to the first

2x = 32

x=16

in the 1st:

16+y = 27

y = 11

in the third:

11+z = 20

z = 9

so we have 2x + 2y + z

= 32+22+9 = 63

**Related Questions**

math,help - can someone please just set the equation for me to solve this ...

Math - Monday, Mr. C stacked a display case of 80 heads of lettuce. By end of ...

math - A miniature-doll collector has a total of 254 unique dolls. The ...

Math - Part 1- Mr. Santiago bought 10 crates of oranges. There were 50 oranges ...

Math - Mr.Santiago brought 10 crates of oranges. There were 50 oranges in each ...

English - Use coordination to combine each pair of sentences below into one ...

math - Mr. Havel bought a car for $2400 and sold it for $2700. what was the ...

math - An art collector buys 6 pieces a year for y years before donating 27 ...

Algebra - A solar collector and its stand are in the shape of a right triangle. ...

math - mr. and mrs. blank sold their house for $200000 and needed to hire an ...