5v^2 + 25 = 115
5v^2 = 115 - 25
5v^2 = 90
v^2 = 90/5
v^2 = 18...take the square root of both sides eliminating the ^2
v = (+-) sqrt 18
v = 4.24 or v = -4.24
By using the first number mulitiply
Answer:
P = 8
Step-by-step explanation:
Given that P varies inversely with x then the equation relating them is
P = 
← k is the constant of variation
To find k use the condition P = 7 when x = 8 , then
7 = 
( multiply both sides by 8 )
56 = k
P = 
← equation of variation
When x = 7 , then
P = 
= 8
Answer:
Step-by-step explanation:
To find out how much we will divide 90 by 300
90 ÷ 300 = 0.3
Then after subtracting 50 soldiers = 300 - 50 = 250 soldiers
Then 250 x 0.3 = 75 days
