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Marina86 [1]
3 years ago
12

On a 10-item test, three students in professor hsin's advanced chemistry seminar received scores of 2, 5, and 8, respectively. f

or this distribution of test scores, the standard deviation is equal to the square root of
Mathematics
1 answer:
swat323 years ago
3 0
The standard deviation is 5 because (2+5+8)/3=5. So the equal square root is square root of 25
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How do u solve 90-2[60÷10]-4
Nikitich [7]
You follow bedmas (brackets, exponents,division,multiplication,addition,subtraction). First comes the brackets so you do (60 divided by 10) which is 6. You still have (6) which means you have to multiply it by 2. So you get 12. Now you got rid of the brackets so you can solve the rest. 90-12-4= 74.
8 0
3 years ago
Read 2 more answers
Mark ordered gummy bears and caramels for his candy shop. He ordered a total of twenty five pounds of there ingredients. Gummy b
Ksju [112]

Answer:

20 pounds of Gummyballs and 5 pounds of caramel was ordered

Step-by-step explanation:

Let :

Gummyball = a

Caramel = b

a + b = 25 - - - (1)

5a + 8b = 140 - - - (2)

From (1)

a = 25 - b

Put into (2)

5(25 - b) + 8b = 140

125 - 5b + 8b = 140

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3b = 15

b = 5

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a = 25 - 5

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Hence,

20 pounds of Gummyballs and 5 pounds of caramel was ordered

8 0
3 years ago
Solve the inequality b - 27 > 3 and write the solution in interval notation
4vir4ik [10]

Step-by-step explanation:

b - 27 > 3 \\ b > 3 + 27 \\ b > 30

8 0
4 years ago
Y varies jointly as x and z, and y = 32 m, x = 6 m, and z = 8 m. what is the value of y when x = 5 m and z = 12 m?
Fynjy0 [20]
As x = 5 & z=12, 

<span>2/3 = y /(xz) = y/(5*12) </span>

<span>= y/60 </span>

<span>so y / 60 = 2/3 </span>

<span>y = (2*60)/3 </span>

<span>= 40</span>
4 0
4 years ago
Can I plz get help I don’t understand
Rzqust [24]

One clock of any type costs $3.20. a clocks cost 3.2a. w clocks cost 3.2w.

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T = 3.2a + 3.2w

T = 3.2(a + w)

Both expressions above are correct answers.

6 0
4 years ago
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