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shepuryov [24]
3 years ago
11

there are 24 hours in a day scientists tell us that we should sleep for 3/8 of a day how much time should we spend sleeping

Mathematics
1 answer:
jeka943 years ago
8 0
When you have to find the part of a number, remember that you have to multiply the two numbers (fraction and whole number)

In a day there are 24 hours.
3/8 of a day
Process:
24 X 3/8 = 9
We sleep 9 hours of the day.


Bascially you go 3/8 = .375 Then multiply .375 x 24 = 9
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If 5-y^2=x^2 then find d^2y/dx^2 at the point (2, 1) in simplest form. ​
ratelena [41]

Answer:

y"(2, 1) = -5

Step-by-step explanation:

Step 1: Define implicit differentiation

5 - y² = x²

Step 2: Find dy/dx

  1. Take implicit differentiation: -2yy' = 2x
  2. Isolate y': y' = 2x/-2y
  3. Isolate y': y' = -x/y

Step 3: Find d²y/dx²

  1. Quotient Rule: y'' = [y(-1) - y'(-x)] / y²
  2. Substitute y': y" = [-y - (-x/y)(-x)] / y²
  3. Simplify: y" = [-y - x²/y] / y²
  4. Multiply top/bottom by y: y" = (-y² - x²) / y³
  5. Factor negative: y" = -(y² + x²) / y³

Step 4: Substitute and Evaluate

y"(2, 1) = -(1² + 2²) / 1³

y"(2, 1) = -(1 + 4) / 1

y"(2, 1) = -5/1

y"(2, 1) = -5

3 0
3 years ago
Elimination: 3x+4y=27; 5x-3y=16
aliya0001 [1]
The solution is:
y = 3
and 
x = 5
7 0
3 years ago
It’s elimination <br> -x+6y=3<br> -4x-2y=-14
gavmur [86]

Answer:

(3,1)

Step-by-step explanation:

Multiplying the second equation by 3, we get

-12x-6y=-42.

Now, adding this to the first equation, we get

-13x=-39

Therefore, x=3

plugging in x=3 to the first equation, we get that

-3+6y=3

adding 3 to both sides,

6y=6

therefore, y=1

6 0
3 years ago
Find the value of x that will allow you to prove that CD below is parallel to EF if the measure of 21 is
irina1246 [14]

Answer:

23

Step-by-step explanation:

According to the diagram, two sum of <1 and <2 is 180 degrees

Hence 3x+30+81 = 180

3x+111 = 180

3x =180-111

3x = 69

x = 69/3

x = 23

8 0
3 years ago
HELP PLEASE <br> LIAM SAYS -(5/12) is equal to 5/-12 is he correct or wrong ?
Sophie [7]

Answer:

He's incorrect

Step-by-step explanation:

lf you put -(5/12) you get -2 1/2 and 5/-12 is -0.4166 and so forth. You can tell these number's aren't the same, so always check with a culculator to make sure. In this case he is wrong.

3 0
2 years ago
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