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olganol [36]
3 years ago
8

According to a commercial, 4 out of 5 dentist recommend a certain brand of toothpaste. Suppose There are 120 dentist in your are

a. What is the expected number of dentist who recommend the brand? What is the standard deviation?
Mathematics
1 answer:
Svet_ta [14]3 years ago
6 0

4/5 recommend, so about 4/5(120) = 96 doctors recommend the brand.

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Write a word phrase that represents x + 5.
baherus [9]

Answer:

5 added to a number, x.

Step-by-step explanation:

I phrased it like other ones I saw before so... :) (Also if you ask someone to write it, I'm sure they'd get x+5)

3 0
4 years ago
3(7 + 4)^2 − 14 ÷ 7 find the anwser <br> 50<br> 361<br> 363<br> 586
Lana71 [14]
Ok so firstly the answer is: 361

but here is a arw by step solution

3(7+4)^2-14/7

add 7 and 4 to get 11

3 x 11^2 - 14/7

calculate 11 to the power of 2 (121)

3 x 121 - 14/7

multiply 3 and 121 to get 363

363 - 14/7

divide 14 by 7 to get 2

363-2

subtract the two and you get 361
5 0
3 years ago
Solve each system of equations by substitution:<br> X + Y = 75<br> 10x + Y = 48
Nimfa-mama [501]

Answer:

X= -3;

Y=78

Step-by-step explanation:

A:       X+Y=75

B:       10X+Y=48

B-A:   (10X+Y)-(X+Y)=48-75

          10X+Y-X-Y= - 27

                       9X=-27

                         X= -3;

Now

A is :     -3+Y=75

                 Y=75+3=78

6 0
4 years ago
A force can never act by itself?
Diano4ka-milaya [45]

Answer:

true

Step-by-step explanation:

An object can never act on itself. Forces related to Newton's third law apply to different bodies, therefore they cannot cancel each other out. For example, the reaction to Earth's gravitational pull on the Moon is the Moon's pull on Earth.

5 0
4 years ago
Read 2 more answers
Katie has a tin of chocolates.
alexgriva [62]
I got 36
50% of 80 = 40
5% of 80= 4
40-4= 36
8 0
3 years ago
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