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VMariaS [17]
2 years ago
11

Tom knows that in his school 10 out of every 85 students are left-handed.

Mathematics
1 answer:
Troyanec [42]2 years ago
4 0

Answer:

46 are left handed

Step-by-step explanation:

divide 10 by 85 and you get 0.11764705882352941176470588235294 then multiply that by 391 and you get 46

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Chuck and Mike need to divide a couch and a pool table. Using the Method of Sealed
ivann1987 [24]
I think 121

406 + 94 = 500 and 180 + 199 = 379.
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7 0
2 years ago
what is the equation in slope intercept form of the line that crosses the x-axis at -2 and is perpendicular to the line represen
Verdich [7]

Answer:

y = -2x - 4

Step-by-step explanation:

So we have the x intercept and a line perpendicular to the one we are trying to find.

Perpendicular deals with the slope.  Perpendicular slopes are negative reciprocals of each other, or in other words, if the slope is m the negative reciprocal is -1/m.

the slope of the perpendicular line is 1/2 so that means the negative reciprocal is -2.

x intercept is when y=0, so the point is (-2, 0).  So that means the equation to make this point with the slope of -2 will look like this

y = mx + b

0 = -2*-2 + b

-4 = b

Now to get into the line we just plug in m and b into y = mx + b

y = mx + b

y = -2x - 4

And to check if you plug in -4 you'll get y = 0

6 0
3 years ago
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Serhud [2]

Answer:

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6 0
3 years ago
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Let X1, X2, and X3 represent the times necessary to perform three successive repair tasks at a service facility. Suppose they ar
belka [17]

Answer:

The mean of the total repair time is 150 minutes.

The variance of the total repair time is 725 minutes^2.

Step-by-step explanation:

To solve this problem, we have to use the properties of the mean and the variance. Our random variable is the sum of 3 normal variables.

In the case, for the mean, we have that the mean of the sum of 3 normal variables is equal to the sum of the mean of the 3 variables:

y=x_1+x_2+x_3 \\\\E(y)=E(x_1+x_2+x_3)=E(x_1)+E(x_2)+E(x_3)\\\\E(y)=50+60+40=150

For the variance, we apply the property for the sum of independent variables (the correlation between the variables is 0):

V(y)=V(x_1)+V(x_2)+V(x_3)\\\\V(y)=s_1^2+s_2^2+s_3^2\\\\V(y)=15^2+20^2+10^2\\\\V(y)=225+400+100\\\\V(y)=725

8 0
3 years ago
I need to know who to solve number 27
miskamm [114]
F=9/5C+32
-9/5C+F=32
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3 years ago
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