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

Which substance is a combination of different atoms?

CLASSIFY: Is solar energy an ecosystem service? Why or why not? Please Explain.

How are meiosis and mitosis different apex?

How long would it take to walk 125 miles?

A constant approach to guidance means that

Kevin recently accepted a job at a Lucky Seven store 17 miles from his house. Use the following information and unit analysis to answer questions a, b, and c. R

Bianca: ¡Tu prima habla mucho! Victoria: Sí, es muy ____________________. A. extrovertido B. extrovertida C. tímida D. tímido

Ben and chris combined their love of hockey with a business venture. they purchased a small portable cart and began selling hockey memorabilia outside of the ho

wieght of a sunday newspaper

What is the benefit of cooling down after exercise?