pope2842 pope2842

27-11-2017
Mathematics

contestada

If a, b and c are positive integers such that a + b = 9 and ac − 2 bc = 0, what is the value of a?

Respuesta :

Аноним Аноним

27-11-2017

ac - 2bc = 0
c(a - 2b) = 0
so a - 2b = 0............................................................(1)
a + b = 9 Multiply this equation by 2:-
2a + 2b =18 .......................................................(2)
Adding equations (1) and (2):-

3a = 18
a = 6 answer

Answer Link

Otras preguntas

the detective asked the wisness to describe the scene of the crime in

Is “I not pity you” grammatically correct?

Solve the system of equations by finding the reduced row-echelon form of the augmented matrix for the system of equations.

why do black holes have a large gravitational pull that even light cannot escape from

A 7% acid solution will be mixed with a 15% acid solution. 20 L of a 12% acid solution needs to be made. Identify the two variables in the problem by completing

ecember 31 of each year. Rupar accounts for the bonds as a held-to-maturity investment, and uses the effective interest method. In Rupar's December 31, 2021, jo

what are the causes of diabetes? in points .

Which step did Woo Jin get wrong and why? step 2, because you do not check for a pulse if you are not trained step 3, because you call 911 only after five minut

What is 4,327 rounded to the nearest thousand?

Some of the sentences below have conjunctions that require you to use the subjunctive, while some have conjunctions that require you to choose between subjuncti