raishankalpapcfdp5 raishankalpapcfdp5

25-07-2018
Mathematics

contestada

the sum of present ages of mother and a daughter is 60 years. after 10 years,the product of their ages will be 1500. find their present qges.

Respuesta :

sadlerkiley sadlerkiley

25-07-2018

Let M and D be the current ages of mother and daughter.

M+D=60 and (M+10)(D+10)=1500.

MD+10(M+D)+100=1500, MD+600+100=1500, so MD=800.

Also, M(60-M)=800, 60M-M^2=800, M^2-60M+800=0=(M-40)(M-20) therefore M=40 (older than daughter) and D=20.

Answer Link

Otras preguntas

A company has 2 machines that produce widgets. an older machine produces 23% defective widgets, while the new machine produces only 8% defective widgets. in add

At the beginning of the story, we meet the narrator, who tells the tale of Captain Ahab and the crew of his ship, the Pequod. Captain Ahab soon reveals the purp

How does changing the amount of one substance affect a mixtures identity and a compounds identity iscience?

How can numbers be expressed ordered and compared for a third grader

What Is a situation in which a compulsion might be implicit ?

gramatically correct a agustin no puedo nada de lo que dice

Graph the following equations with the given constraints. I'm having trouble understanding how to do this.

I need help with this Alice question.

What motivates achilleus in his battle with hektor? select one: a. he seeks revenge for the death of his friend patroklus. b. he hopes to win hektor to his side

solve the equation. check for extraneous solutions.|x+24|=-7xplease show work