Answer:
The ratio of length to breadth is 3:4
let the length be 3x
breadth be 4x
area = 4x x 3x
6912 = 12x^2
x^2 = 576
x=24
length= 72
breadth =96
actually length will be greater than breadth
so the ratio must be 4:3 then alter the above length and breadth values
Answer:
6
Step-by-step explanation:
30-21=9
9/3=3
3x2=6
The total temperature of the magnesium sample is its original temperature plus the temperature increase which is dependent on time. This total should exceed 650 degrees. Thus, the inequality that best describes the condition is,
255 + 10m ≥ 650
m ≥ 39.5
The answer is letter b.
8v + 9b = 228
4v + 5b = 124....multiply by -2
------------------
8v + 9b = 228
-8v - 10b = - 248 (result of multiplying by -2)
----------------add
-b = - 20
b = 20 <=== each bus holds 20 students
4v + 5b = 124
4v + 5(20) = 124
4v + 100 = 124
4v = 124 - 100
4v = 24
v = 24/4
v = 6 <=== each van holds 6 students
