If x be one angle then its complementary angle = 90-x
therefore we can write the equation:-
x - (90- x) = 84.8
2x -90 = 84.8
2x = 174.8
x = 174.8 / 2 = 87.4 degrees
and its complement = 90 - 87.4 = 2.6 degrees
Option A would be the best strategy here.
Answer:
x = -2 and y = 0
Explanation:
You just put the value of one variable in terms of the other in one of the two equations. Then, solve it and BOOM you'll have your solution.
x + y = -2 ........... (a)
y = x + 2 ............ (b)
Put (b) in (a),
x + (x + 2) = -2
2x = -4 => x = -2
Put x = -2 in (b),
y = x + 2 = -2+2 = 0
Thus, x=-2 and y=0
As we know,
So, we can infer that :
Now, let's calculate the mass of gases in each case :
<h3>Case A : Hydrogen ~</h3>
or
<h3>Case B : Helium ~ </h3>
or
<h3>Case C : Nitrogen ~ </h3>
or
So, the arrangement of masses from least to greatest is :
- (1.) Hydrogen < (2.) Helium < (3.) Nitrogen
Answer:
B. 54π units ²
Step-by-step explanation:
solution:
given,
Radius (r) = 3
(l) = 15
we know that,
T.S.A. of cone = πr( r + l )
= π × 3(3 + 15)
= π × 3 × 18
= π × 54
= 54π units ²
