Answer:
a). 
b). V = 15 units
Step-by-step explanation:
Focal length F of a lens made by combining two lenses of different focal lengths U and V will be,
A). By solving the given formula,
B). If F = 6 and U = 10 then we have to find the value of V.
By substituting the given values in the formula,
V = 15 units
Therefore, focal length (V) of the lens = 15 units
Answer:
243.911, or rounding to the nearest unit, 244.
Step-by-step explanation:
For this, you need to know a concept in Trigonometry called "Law of Sines". This states that the ratio of any side of a triangle to the sine of the angle opposite is equal for all cases in that triangle.
Knowing this:
To solve this we must isolate x which involves having the variables on one side and the numbers on the other.
First add 2m to both sides
<em>3m+7/2=-2m+5/2</em>
<em>5m+7/2=5/2</em>
Then we subtract 7/2 from both sides
<em>5m+7/2=5/2</em>
<em>5m=-1</em>
Finally we divide both sides by 5
<em>5m/5=-1/5</em>
<em>Our final answer is -1/5</em>
<em>So the answer is B</em>
Hope this helps!
The 1st question: 2nd one
2nd: 3rd one
3rd: 1st one
HOPE THIS HELPED!!!!!
~SOPHIA~
