3x + 4y = -5
-3x -3x
4y= -3x -5
/4 /4
y= -3/4x-5/4
3x + 3y = -2
-3x -3x
3y = -3x-2
/3 /3
y= -1x-2/3
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Responder:
Pantalón = 50 €
Zapatos = 76 €
Explicación paso a paso:
Total pagado por pantalón y zapatos = 126
Sea el precio del pantalón = p; zapatos = s
p + s = 126
1,14 p = 0,75 s
p = 0,75 s / 1,14
0,75 s / 1,14 + s = 126
(0,75 s + 1,14 s) / 1,14 = 126
0,75 s + 1,14 s = 143,64
1,89 s = 143,64
s = 143,64 / 1,89
s = 76
p + s = 126
P = 126 - s
P = 126 - 76
p = 50
Answer:
y=-3x+6
Step-by-step explanation:
Answer:
About 95% of house sizes that lie between 955.7 and 1454.1 sq ft .
Step-by-step explanation:
According to the empirical rule about 68% of the data is within one standard deviation of the mean; about 95% of the data is within two standard deviations of the mean ; about 99.7% of the data is within three standard deviations of the mean.
We have given:
Sample mean : x¯=1204.9 sq ft
Standard deviation: s=124.6 sq ft
To find the percentage of house sizes that lie between 955.7 and 1454.1 sqft.
We can write it as
955.7= 1204.9 - 249.2 = 1204.9 - 2(124.6)
and 1454.1 = 1204.9 + 249.2 = 1204.9 + 2(124.6)
Thus, 955.7 is 2 standard deviations left from the means and 1454.1 is 2 deviations right from the mean.
Then by empirical rule , about 95% of house sizes that lie between 955.7 and 1454.1 sq ft .