B. 21.39 because I said so and I did all the calculations and apparently I need more than 20 words but there is your answer enjoy
Answer:
the first one is 3.4
Step-by-step explanation:
how this helps
Answer:

Step-by-step explanation:
r = 5/(3sinθ-cosθ)
multiply both sides by (3sinθ-cosθ):
r(3sinθ-cosθ) = 5
expand:
3rsinθ-rcosθ = 5
replace rsinθ with y and rcosθ with x:
3y-x = 5
add x to both sides:
3y = x + 5
divide both sides by 3:
y = 1/3x + 5/3
: )
Answer:
1.75 or 
Step-by-step explanation:
2.5 * 7/10 is just like 2.5 * 0.7
so 2.5 * 0.7 = 1.75
You could also convert 2.5 to fraction which is 25/10
so you would have
=
reduced would equal 
How this helps you! :)
Could you please mark this answer as brainiest?
It would help me!
Thank you!
Answer:
The correct answer is <em><u>11/2.</u></em>