Which stone chips easily
Answers
Answer:
answer
(i) x+y=5 ...(i)
2x+2y=10 ...(ii)
⇒x+y=5
⇒y=5−x
x 0 3
y 5 2
plot (0,5) and (3,5) on graph and join them to get equation x+y=5.
2x+2y=10
⇒2y=(10−2x)
⇒y=
2
10−2x
=5−x ...(iii)
x 5 2
y 0 3
so, the equation is consistent and has infinitely many solution
(ii) x−y=8 ....(i)
3x−3y=16 ....(ii)
⇒x−y=8
⇒−x+y=−8
⇒y=−8+x
⇒y=x−8
x 8 0
y 0 -8
3x−3y=16 ...(ii)
⇒3x=16+3y
⇒3x−16=3y
⇒y=
3
3x−16
⇒y=x−
3
16
x
3
16
0
y 0
3
−16
plotting both the equation in graph, we see that the lines are parallel , so inconsistent.
(iii) 2x+y−6=0
4x−2y−4=0
2x+y=6 ....(i)
4x−2y=4 ...(ii)
for equation (i), 2x+y=6⇒y=6−2x
x 0 3
y 6 0
plot point (0,6) and (3,0) on a graph and join then to get equation 3x+y=6
for equation (ii), 4x−2y=4⇒
2
4x−4
=y
x 1 0
y 0 −2
plot point (1,0) and (0,−2) on a graph and join them to get equation 4x−2y=0
x=2,y=2 is the solution of the given pairs of equation . so. solution is consistent.
(iv) 2x−2y=2 ...(i)
4x−4y=5 ...(ii)
2x−2y=2⇒2x−2=2y
y=x−1
x 0 1
y −1 0
plot point (0,1) and (1,0) and join to get the equation 2x−2y=2 on a graph 4x−4y=5⇒4x−5=4y
⇒
4
4x−5
=y
x 0
4
5
y −
4
5
0
plot point (0,−
4
5
)
Answer:
Flint
Explanation:
Flint is a forms of rock.
Flint is a sedimentary cryptocrystalline form of the mineral quartz, categorized as the variety of chert that occurs in chalk or marly limestone. Flint was widely used historically to make stone tools and start fires. It occurs chiefly as nodules and masses in sedimentary rocks, such as chalks and limestones