yutongliang910 yutongliang910

25-07-2021
Mathematics

contestada

3x + ky = 8
X – 2ky = 5
are simultaneous equations where k is a constant.
a) Show that x = 3.
b) Given that y = 1/2 determine the value of k.

Respuesta :

Аноним Аноним

25-07-2021

Answer:

a) 3x + ky = 8

ky = 8 - 3x

x – 2ky = 5

x - 2(8 - 3x) = 5

x - 16 + 6x = 5

7x = 21

x = 3 (shown)

b) x-2ky = 5

sub x = 3, y = 1/2

3-2k(1/2) = 5

-2k = 2

k = -1

Answer Link

Otras preguntas

what is the mass number of an atom that has 4 protons 4 electrons and 5 neutrons

Define Physical and Chemical change

What does lame mean in this sentence from the passage

-6y=9x-48 what is the answer for this

Simplify: 1/3 (9x - 5) A) 3x - 5 B) 3x - 5/3 C) 6x - 5 D) 6x - 2

penn foster spanish exam 700419

One of the major innovations of nineteenth-century type design were the antique faces, also known as ___________, which convey a bold, machine-like feeling thro

Evaluate 3(5 - 8) - 7

Complete each sentence with the appropriate form of the verb aller.Modèle: Sabrina va au café.1. Salima et Théo_ en boîte.2. Jechez moi.3. Nous n'pas au cinéma.

. El profesor Merino enseña química. Cierto Falso 2. Los lunes, la clase es de ocho a nueve de la mañana. Cierto Falso 3. Los viernes, la clase es a las nueve.