X-2y=3 चा आलेख काढण्यासाठी y=1 असताना x ची किंमत काढा.

Answer:

sedimentary rocks: rocks undergo weathering in the course of time. the debris so formed will be decomposed in the Low regions as layers. this materials gradually get a lithified and transform into sedimentary rocks eg: sandstone, limestone as the sedimentary rocks are formed in the layers they are also known stratified rocks

metamorphic rock when the rocks undergo physical and chemical change due to high temperature and a pressure metamorphic rocks are formed example slate, marble metamorphic rocks are prominent in Kerala

Answer:

21

Step-by-step explanation:

Since in the proportions the product of extremes is equal to the product of mean.

That means 12 multiplied X = 9 multiplied 28

12x = 252

X = 252/12

X = 21.

x:9::28:12

x/9=28/12

x=28×9÷12

x= 21 (by the laws of proportion )

Answer:

Wow!What a big tree it is!

Explanation:

Wow ! the tree is very long

8th term of an A.P. is double the 13th term.

To prove : 2nd term is double the 10th term.

As we know that,

General term of an A.P.

⇒ Tₙ = a + (n - 1)d.

Using this formula in this question, we get.

8th term of an A.P. is double the 13th term.

⇒ T₈ = 2 x T₁₃.

⇒ a + (8 - 1)d = 2 x [a + (13 - 1)d].

⇒ a + 7d = 2 x [a + 12d].

⇒ a + 7d = 2a + 24d.

⇒ a - 2a = 24d - 7d.

⇒ - a = 17d.

⇒ a = - 17d.

2nd term is double the 13th term.

⇒ T₂ = a + (2 - 1)d.

⇒ T₂ = a + d.

Put the values in the expression, we get.

⇒ T₂ = - 17d + d.

⇒ T₂ = - 16d.

Double the 13th term.

⇒ 2 x T₁₃.

⇒ 2 x [a + (13 - 1)d].

⇒ 2 x [a + 12d].

⇒ 2a + 24d.

⇒ 2(-17d) + 24d.

⇒ - 34d + 24d.

⇒ - 10d.

No, 2nd term is not equal to double the 13th term.

Hence, 2nd term is equal to double the 10th term.