Step-by-step explanation:
formula: gram of solute/gram of solution X 100
so 150/400 X 100 is <u>3</u><u>7</u><u>.</u><u>5</u><u>%</u><u> </u><u>of</u><u> </u><u>KNO3</u>
<u>Answer:</u>
243 students are involved in either sports or music whereas 100 are not
involved in either of it.
<u>Step-by-step explanation:</u>
No. of students who are in music = 115
No. of students who are in sports = 197
No. of students who are in both activities = 69
So, no. of students who are involved either in sports or music,
= (115 + 197 - 69)
=243
So, no. of students who are not involved in either sports or music,
= (343 - 243)
=100
F(x) has no x^2 term if it's a line. x^2 would be a quadratic
<h3><u>
Answer:</u></h3>
<h3><u>
Step-by-step explanation:</u></h3>
Surface area = (5 x 5) + (5 x 5) + (5 x 5) + (5 x 5) + (5 x 5) + (5 x 5)
<h3><u>Conclusion:</u></h3>
Hence, Option B is correct.
Hoped this helped.
Answer: C
Explanation:
Test A.
The left side is
tan(x - π/4) = [tan(x) - tan(π/4)]/[1 + tan(x)*tan(π/4)]
= [tan(x) - 1]/[1 - tan(x)]
= -1
This is not equal to the right side.
Statement A is not an identity.
Test B.
The right side is
sin(x+y)/(sinx siny) = [sin(x)cos(y) + cos(x)sin(y)]/[sin(x)sin(y)]
= cot(y) + cot(x) = 1/tan(y) + 1/tan(x)
= [tanx + tany]/[tan(x)tan(y)]
This is not equal to the left side.
Statement B is not an identity.
Test C.
The right side is
[sin(x)cos(y) - cos(x)sin(y)]/[cos(x)cos(y)]
= sin(x)/cos(x) - sin(y)/cos(y)
= tan(x) - tan(y)
Ths equals the left side.
Statement C is an identity.
Test D.
The left side is
cos(x)cos(π/6) - sin(x)sin(π/6)
= (√3/2)cos(x) - (1/2)sin(x).
The right side is
sin(x)cos(π/3) - cos(x)sin(π/3)
= (1/2)sin(x) - (√3/2)cos(x)
The two sides are not equal.
Statement D is not an identity.