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Maksim231197 [3]
3 years ago
8

Amal worked a total of 30 hours last week on Saturday and Sunday he worked 5 times and many hora than he worked the rest of the

week how many hours did he work of the week
Mathematics
1 answer:
aleksley [76]3 years ago
7 0
6 because 30 divided by5 is 6
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College freshmen took a psychology exam. If the mean is 80, the SD is 10, and the scores have normal distribution, what percent
gayaneshka [121]

Answer:

  (a)  2%

Step-by-step explanation:

A score of 60 is 2 standard deviations below the mean (80 -2·10 = 60). The empirical rule tells you that 95% of the distribution is within 2 standard deviations of the mean. The remaining 5% is split evenly between those that are more than 2 SD above the mean and those that are more than 2 SD below the mean.

That tells you the percentage who failed is about 2.5%. The best answer choice is 2%.

_____

<em>Additional comment</em>

The empirical rule is a little bit sloppy, but it gets you in the ballpark. The actual percentage is closer to 2.275%.

6 0
2 years ago
The first figure is dilated to form the second figure.
siniylev [52]
The scale factor is 4 5.8/1.45=4
4 0
3 years ago
The answer is 35 degrees, but I am unsure of the process in order to get to that answer.
hammer [34]

Answer:

Step-by-step explanation:

Hello There!

So first things first

we need to find the measure of ∠ABD

If you didn´t know the sum of the triangle angles is 180

so to find ∠ABD we subtract the given angles ( 30 and 25) from 180

180-25-30=125

so angle ∠125

Now lets find ∠DBC

∠ABD and ∠ DBC are supplementary angles so the sum of the two angles is 180

So to find ∠DBC we subtract 125 from 180

180-125=55

so ∠DBC = 55

Now we can find the measure of ∠BDC

remember like stated before the sum of all of the angles in a triangle is 180

So to find the measure of ∠BDC we subtract the given angles from 180

180-90-55=35

so we could conclude that ∠BDC = 35

Other ways to solve for ∠DBC:

angle DBC is an exterior angle of ΔABD

the measure of an exterior angle is equal to the sum of the opposite interior angles

so basically ∠DBC = ∠ADB + ∠BAD

30+25=55 so ∠DBC = 55

Other ways to find angle BDC:

Having found the measure of ∠DBA and the other opposite angle we could find ∠BDC

Like stated before the measure of an exterior angle is equal to the sum of the opposite interior angles

basically ∠DBA = ∠BDC + ∠BCA

we have the measures of ∠BCA and ∠DBA so we plug in the values

125=∠BDC+90

isolate the variable by subtracting each side by 90

125-90=35

we´re left with

∠BDC=35

I hope this helps and if you have anymore questions, feel free to ask! :)

4 0
3 years ago
Read 2 more answers
The expression 62.4d - 210 gives the number of Indian rupees you receive when you exchange $d at the local
nadya68 [22]

Answer:

You will receive 601.2 Indian rupees.

Step-by-step explanation:

Because 62.4d-210 is the expression per dollar, and you are exchanging 13 dollars, you need to plug in 13 for d, because 13 is the number of dollars, and d represents the number of dollars.

62.4(13)-210     solve.

811.2-210

601.2 The answer is then 601.2

4 0
3 years ago
When teachers purchase a ream of paper, the ream of paper weighs 5 pounds. How much does 10 reams of paper weigh?
Tatiana [17]
I believe it would be 50 pounds. if one ream is 5 pounds, you would multiply that by however many reams you have. so if you have 10 you do 5 • 10 which gives you 50
7 0
3 years ago
Read 2 more answers
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