Responda:
a) 3 e 4
Explicação passo a passo:
Deixei :
Número de cães = x
Número de gatos = y
2x + 3y = 17 - - - - (1)
x - y = 1 - - - - (2)
De (2)
x = 1 + y
Coloque em (1)
2 (1 + y) + 3y = 17
2 + 2y + 3y = 17
2 + 5y = 17
5y = 17 - 2
5y = 15
y = 15/5
y = 3
x = 1 + y
x = 1 + 3
x = 4
Número de cães = x = 4
Número de gatos = y = 3
Answer:
y=4x is a line with slope=4 and pass through (0,0)
y=4 is a line parallel to the x-axis and pass through the (0,4)
Step-by-step explanation:
y=4x is a line with slope=4 and pass through (0,0)
y=4 is a line parallel to the x-axis and pass through the (0,4)
1 mile = 6.45 minutes
? miles = 30 minutes
? miles = 30 / 6.45 = 4.65116279 (round up)
4.7 miles = 30 minutes
So roughly 4 and a half miles in 30 minutes
Answer:
A. 30% B. 45%
Step-by-step explanation:
A. 72,000/240,000 = x/100
(72,000)(100) = (240,000)x
7,200,000 = 240,000x
30 = x
B. 108,000/240,000 = x/100
10,800,000 = 240,000x
45 = x
