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VikaD [51]
3 years ago
14

The Jenkin's family decided to go to a concert in the park for their family reunion. A total of 29 family members attended. An a

dult ticket cost $6.50 and a child ticket cost $5.00. The bill came to $164.50. How many children went to the concert?
A) 13
B) 694
C) 16
D) 1
Mathematics
1 answer:
barxatty [35]3 years ago
4 0

Answer:

16   PLS GIVE ME BRAINLIEST

Step-by-step explanation:

X=ADULTS TICKET AND Y=CHILDRENS TICKET

x+y=29 because their are 29 people attending

6.50x+5y=164.5 because htats how much it coests

now bring anyy equation in y=mx+b form.

so it will be y=29-x

6.5x+5(29-x)=164.5

6.5x+145-5x=164.5

1.5x=19.5

x=13

Now plug it in any one of the equation

13+y=29

y=16

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Step-by-step explanation:

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3 years ago
Find the first partial derivatives of the function f(x,y,z)=4xsin(y−z)
Amanda [17]

Answer:

f_x(x,y,z)=4\sin (y-z)

f_x(x,y,z)=4x\cos (y-z)

f_z(x,y,z)=-4x\cos (y-z)

Step-by-step explanation:

The given function is

f(x,y,z)=4x\sin (y-z)

We need to find first partial derivatives of the function.

Differentiate partially w.r.t. x and y, z are constants.

f_x(x,y,z)=4(1)\sin (y-z)

f_x(x,y,z)=4\sin (y-z)

Differentiate partially w.r.t. y and x, z are constants.

f_y(x,y,z)=4x\cos (y-z)\dfrac{\partial}{\partial y}(y-z)

f_y(x,y,z)=4x\cos (y-z)

Differentiate partially w.r.t. z and x, y are constants.

f_z(x,y,z)=4x\cos (y-z)\dfrac{\partial}{\partial z}(y-z)

f_z(x,y,z)=4x\cos (y-z)(-1)

f_z(x,y,z)=-4x\cos (y-z)

Therefore, the first partial derivatives of the function are f_x(x,y,z)=4\sin (y-z), f_x(x,y,z)=4x\cos (y-z)\text{ and }f_z(x,y,z)=-4x\cos (y-z).

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Answer:

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ANSWER

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5 0
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Answer:

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In order to find the missing percent we multiply the 450 by 100 and divide its product by 30

The answer is 1500

Step-by-step explanation:


8 0
3 years ago
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