Serena866 Serena866

14-07-2014
Mathematics

Answered

Ralph is 3 times as old as Sara. In 6 years, Ralph will be only twice as old as Sara will be then.

Find Ralph's age now.

Verified Answer :

14-07-2014

R = 3S

R + 6 = 2 (S+6)

Substitute the first equation in the second one:

(3S) + 6 = 2 (S + 6)

3S + 6 = 2S + 12

S + 6 = 12

R = 18
S = 6

Check:

R is 3 times S now.

In 6 years, R will be (18 + 6) = 24, S will be (6 + 6) = 12.

24 = 2 x 12 yay

Answer Link

Related Questions

Choose all the answers that apply Which of the following minerals can be scratched with a fingernail talc diamond topaz quartz

How did economic sanctions affect apartheid in Africa

Which of Xie Hes principles of painting is closely connected to calligraphy

Which of these prompts require you to write a reflective essay Explain the concept of time and space travel Why should teenagers be encouraged to get parttime j

The World Wide Web Internet may be used in the research part of the scientific method a True b False

name 3 equivalent fractions for 12

How does the growth of antibiotic resistance in bacteria support the theory of evolution by natural selection

Refusing Sancho Panzas food Don Quixote nourishes himself on a nuts and berries c chicory water boiled in a hat b flour from the windmills d memories

What is an appropriate response to Cuál es tu número de teléfono

An oil spill spreads 25 square meters every 16 hour how much area does the oil spill cover after 2 hours