Answer:
48 dias
Step-by-step explanation:
1000 gramas = 1 kg
A quantidade inicial de areia = 40kg
1 kg = 1000g
40kg = x
Multiplicação cruzada
1 kg × x = 40 kg × 1000g
x = 40 kg × 1000g / 1 kg.
x = 40,000 gramas
Somos informados de que 2/5 se esgotou.
Quantidade que foi drenada =
40,000 × 2/5
= 16,000 gramas foram drenados
Quantidade restante = 40,000 gramas - 16,000 gramas
= 24,000 gramas
A areia escoa a 500g por dia, portanto,
500g = 1 dia
24,000g = x
Multiplicação cruzada
500g × x = 24, 000 × 1
x = 24,000 g × 1 dia / 500
x = 48 dias
Restariam 48 dias para que a areia restante vazasse.
y= mx + b
1) line 1.
b= 1, m=1/7, y= 2/7x +1
Colored under this line, and line is solid, so y≤ 2/7x +1.
We can modify it
7* y≤ 7*(2/7x +1), ---> 7y≤ 2x +7 or 7y-7≤2x
We have this inequality in A. and D.
2) line 2. Lets take dotted line.
y = mx + b
b= -5, m = 8/2 = 4
y = 4x -5
Colored over this line, so it is y > 4x -5. or y+5>4x
y+5>4x Between A and D we have this inequality in D.
So, we can check D.
Answer is D, if we look at the graph.
Answer:
30,775.14 mm²
Step-by-step explanation:
area - πr²
3.14 x (99)²
30,775.14 mm²
Answer:
12-7/5-3=5/2
Step-by-step explanation:
Answer is 4 :) I hope it help you.