Answer:
Answer of question 1 :
Explanation:
Let x be the legs of ducks
And y be the legs of cows
According to the question,
2x + 4y = 52...…..(i) ( as ducks ahs two legs and as cows has 4 legs)
As he has 21 animals in total so,
x + y = 21...…..(ii)
We have make the equation. We will solve them by eliminatory method or substitution method. Here, I'll go for substitution method.
From equation (ii)
x = 21 - y....…..(iii)
Putting the value of x in equation (i),
2x + 4y = 52
2( 21 - y ) + 4y = 52
42 - 2y + 4y = 52
2y = 52 - 42
y = 10/2
y = 5 ( He has 2 cows)
putting the value of y in equation (ii)
x + y = 21
x + 5 = 21
x = 21 -5
x = 16 ( He has 16 ducks)
<h2 /><h3>Which of these is an agent of chemical weathering?</h3>
<h3>
<em>Answer</em><em>;</em><em> </em><em> </em><em> </em><em>The primary agents in chemical weathering are water, oxygen and acids. Explanation: These react with surface rocks to form new minerals that are stable in,or in equibrilium with the physical and chemical conditions present on the earth's surface</em></h3>
<h3>
<em>Hope</em><em> </em><em>it's</em><em> </em><em>helpful</em><em> </em><em>to</em><em> </em><em>you</em><em> </em><em>please</em><em> </em><em>rate</em><em> </em><em>me</em><em> </em><em>and</em><em> </em><em>like</em><em> </em><em>my</em><em> </em><em>answer</em><em>.</em><em>,</em><em>.</em><em>.</em><em>.</em></h3>
What image ? you have to attach it
Answer:
there is no photo................