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iris [78.8K]
3 years ago
9

Terry’s 7th grade class started out with 40 students. Over the last 4 months the class has seen a 30% decrease in students. How

many students are now in Terry’s class?
Mathematics
1 answer:
Rashid [163]3 years ago
4 0

Answer:

28 students

Step-by-step explanation:

30% is equal to .3

40 x .3 equals 12

This means the class has lost 12 students.

40 - 12 is 28.

Another way:

Because the class has lost 30% of it's students, you know that the class is 70% of it's original capacity.

70% is equal to .7

40 x .7 is 28

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Is the square root of 100 000 000 irrational
Lesechka [4]

Answer:

No.

Step-by-step explanation:

100 000 000 = 10^8

So its square root = (10^8)^1/2

= 10^4

= 10,000.

  which is rational.

You can check out this answer on a calculator. It is correct.

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3 years ago
Steven purchases a bowl. The diameter of the
IceJOKER [234]

Answer:

43.96cm

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8 0
3 years ago
Read 2 more answers
Determine whether each of the following functions is a solution of laplace's equation uxx uyy = 0.
ratelena [41]

Both functions are the solution to the given Laplace solution.

Given Laplace's equation: u_{x x}+u_{y y}=0

  • We must determine whether a given function is the solution to a given Laplace equation.
  • If a function is a solution to a given Laplace's equation, it satisfies the solution.

(1) u=e^{-x} \cos y-e^{-y} \cos x

Differentiate with respect to x as follows:

u_x=-e^{-x} \cos y+e^{-y} \sin x\\u_{x x}=e^{-x} \cos y+e^{-y} \cos x

Differentiate with respect to y as follows:

u_{x x}=e^{-x} \cos y+e^{-y} \cos x\\u_{y y}=-e^{-x} \cos y-e^{-y} \cos x

Supplement the values in the given Laplace equation.

e^{-x} \cos y+e^{-y} \cos x-e^{-x} \cos y-e^{-y} \cos x=0

The given function in this case is the solution to the given Laplace equation.

(2) u=\sin x \cosh y+\cos x \sinh y

Differentiate with respect to x as follows:

u_x=\cos x \cosh y-\sin x \sinh y\\u_{x x}=-\sin x \cosh y-\cos x \sinh y

Differentiate with respect to y as follows:

u_y=\sin x \sinh y+\cos x \cosh y\\u_{y y}=\sin x \cosh y+\cos x \sinh y

Substitute the values to obtain:

-\sin x \cosh y-\cos x \sinh y+\sin x \cosh y+\cos x \sinh y=0
The given function in this case is the solution to the given Laplace equation.

Therefore, both functions are the solution to the given Laplace solution.

Know more about Laplace's equation here:

brainly.com/question/14040033

#SPJ4

The correct question is given below:
Determine whether each of the following functions is a solution of Laplace's equation uxx + uyy = 0. (Select all that apply.) u = e^(−x) cos(y) − e^(−y) cos(x) u = sin(x) cosh(y) + cos(x) sinh(y)

6 0
2 years ago
28 POINTS BRAINLIEST
Arisa [49]

Answer:

The roots can be seen from the graphs as - 4 and +4

The equation is :

x² - (sum of roots) + (product of roots)

Equation is x² -16

I hope you got it

7 0
4 years ago
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