# Math

posted by .

Sarah is two-thirds as old as Jenny. Jenny is 7 years older than Sarah. Which system of equations could be used to find the girls’ ages?

A. 3s – 2j = 0
j – 7 = s

B. j = 2/3s
s + 7 = j

C. j – 2/3 = s
j – s = 7

D. 2/3j = s
j + 7 = s

• Math -

and what is your thinking?

• Math -

i think its D. is that right?

## Similar Questions

1. ### math

can you solve this equation by using simultaneous equations and can you write the method please?
2. ### math - help me plz

can you solve this equation by using simultaneous equations and can you write the method please?
3. ### geometry

if sarah gets enough money to go to a movie, jenny will go. if jenny goes bob will go. if bob goes jake will go. only two people go to the movie, who are they?
4. ### Statistics

jenny is 5'10" tall. the heights of the girls in the school are approximately normally distributed with a mean of 5'5" and a standard deviation of 2.6". What is the percentile of jenny's height?
5. ### algebra

sarah is twice as old as katie. 10 years ago, the sum of their ages was 23. How old are they now
6. ### maths

sarah, tom and johns were all friiends. sarah and john were surprised to know that tom didn't know how old they were. sarah: if you add athird of my age to three quartes of toms age you get, 30.5 tom: if you take my age and double …
7. ### Math

Two old friends meet. They hadn't seen each other in 22 years. Betty is 6 years older than France's, but neither is older than 50. The sum of their ages when they met is exactly half of their ages today. How old is Betty?
8. ### Math

Sarah and Louise have a combined age of 24. Six years ago, Sarah was three times as old as Louise. Let Sarah be x years and Louise y years
9. ### Algebra

The sum of brandon and Sarah's ages is thirty-six brandon is ten years younger than sarah how old is brandon?
10. ### Maths

Harry is x years old now. 3 years ago Jenny was twice Harry's age. In three years timthe Ahmed will be 5 times as old as Jenny. Write an expression for Ahmed's ago now.

More Similar Questions