Answer:40 square yards
Step-by-step explanation:
Given
Floor area A=10 square yards
Red tile costs
per square yards
White tile costs
per square yards
Total money spent=
on tiles
Suppose red tiles cover an area of
square yards
So, we can write

Red tiles cover an area of 40 square yards
Answer:
aₙ = -15 + 10 * (n-1)
Step-by-step explanation:
aₙ = a₁ + (n-1)*d a₁: first term d: common difference
a₅ a₁ + 4d =25 .... (1)
a₁₁ a₁ + 10d = 85 ...(2)
(2) - (1) 6d = 60
d = 10
a₁ = -15
Formula: aₙ = -15 + 10 * (n-1)
400,000 milligrams because 1 gram is 1000 milligram.
Answer: 6-1/3n
Step-by-step explanation:
Given:
unit rate: 20km/h
Speed = distance / time
20kmh = 30km / time
time = 20kmh / 30km
time = 2/3 hrs or 40 minutes
2/3 hrs * 60mins/hr = (2*60)/3 = 120/3 = 40 minutes