Answer:
r = 9
Step-by-step explanation:
Given that c varies directly as (r + 1) then the equation relating them is
c = k(r + 1) ← k is the constant of variation
To find k use the condition c = 8 when r = 3, then
8 = k(3 + 1) = 4k ( divide both sides by 4 )
2 = k
c = 2(r + 1) ← equation of variation
When c = 20, then
20 = 2(r + 1) ← divide both sides by 2
10 = r + 1 ( subtract 1 from both sides )
9 = r
51/5 is equivalent to 10 and 1/5.
Answer:
ididk
Step-by-step explanation:
ddkkdk
x-2=7
apply additon property of equality
x-2+2=7+2
x=9
Answer:
961
Step-by-step explanation:
this is equivalent to(31*31)