For what value of k will the system of equations 2x + 3y =13 and 3x + ky =18 have no solution?
Answers
I. Answer the following questions in one or two sentences.
1. Between which latitudes are the hot deserts of the world located?
Answer: The hot deserts of the world are located between latitudes 15˚ and 30˚ north and south.
2. Name the main hot deserts of the world.
Answer: The Sahara, the Great Australian Desert, the Arabian Desert, the Thar, the Kalahari, the Namib and the Atacama deserts.
3. What is an oasis?
Answer: An oasis is a lush green place in a desert where fresh water comes to the surface from an underground.
4. What do animals in the hot desert regions do to survive the heat?
Answer: The animals rest in shady places like under stones or in burrows, during the day and out to hunt at night.
5. Where do the nomadic people of the hot deserts live?
Answer: The nomadic people live in tents made from wool or animal skins.
6. Why is the importance of the caravan traders slowly fading?
Answer: The introduction of faster means of transport like desert jeeps, vans and trucks, the importance of the caravan traders is slowly fading.
Answer:
ANSWER
3x+y=1
(2k−1)x+(k−1)y=(2k+1)
For no solution
a
2
a
1
=
b
2
b
1
=
c
2
c
1
Then
2k−1
3
=
k−1
1
=
2k+1
1
⇒3k−3=2k−1⇒k=2