150 grams because 5 oz is equal to 141 grams
1. 8
2. 100
3. 5
I didn’t get an answer for number 4
The standard deviation for the cost of mobile cell phones is 10.925.
Given
Mobile cell phone cost Number of students
10-19.99 7
20-29.99 20
30-39.99 28
40-49.99 12
50-59.99 7
We have to calculate the standard deviation of the given data.
Standard deviation is a measure which measures the variation in te values of data sets.
We know that the formula of calculating standard deviation is as under:
Standard deviation=
/
Mean=33.91392 (calculated in figure)
∑f
=8713.514 (calculated in image)
∑f-1=74-1=73
We have to now just put the values and find the value of standard deviation.
Standard deviation=
=
=10.925
Hence the standard deviation of mobile cost is 10.925.
Learn more about standard deviation at brainly.com/question/475676
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X = 3
y = -1
get the x or y by itself first (second eq. is easier)
So, x + 2y = 1
-2y -2y
Now we get:
x = -2y +1 Plug it into the other equation.
2x + 3y = 3
2(-2y +1) + 3y = 3
-4y + 2 + 3y = 3
-1y +2 = 3
+1y -3 -3 +1 y
y = -1 (plug into either eq to get x)
<span>x + 2y = 1
</span>x+2(-1) = 1
x-2=1
+2 +2
x = 3