hello394
hello394 hello394
  • 02-11-2020
  • Mathematics
contestada

Joe is twice as old as Mary. Nick is 7 years older than Mary. The sum of their ages is 43. What is the age of each person?

Respuesta :

Upendo
Upendo Upendo
  • 02-11-2020

Answer:

x Joe age

y Mary age

z Nick age

x = 2y

z = 7 + y

x + y + z = 43

substitute values of x and z

2y + y + 7 + y = 43

4y = 43 - 7

4y = 36

y = 9

Joe is 2y = 18

Nick is 7 + y = 16

Mary is 9

Answer Link

Otras preguntas

Our teacher (tell)_________ us yesterday..
How many cups are in 8 1/2 gallons?
Ms. Paron sells fruits in the market. Banana costs 25 pesos per kilo-gram and grapes costs 180 pesos per kilogram. A customer bought 5.25 kilos of banana and 3.
A group wants to visit a water park over the summer. Tickets cost $10 for each child and 15 for each adult
Why did the United States engage in imperialism? Give 5 sentences
for how many years is a united states senator elected – that is, how many years are there in one full term of office for a u.s. senator?
True/False 1. Many Brazilians are of German or Italian ancestry.
HELP PLZZZZ ASAP im so desperate to get this done if you can help plz plz plz do if i dont finish it ill be forced to redue the whole course over again In this
where was the first criminal fingerprint identification made?
I need help with these.
ACCESS MORE