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taurus [48]
3 years ago
6

What is the sum of thirty and twenty

Mathematics
1 answer:
Klio2033 [76]3 years ago
4 0
50 because their product is equal to and the sum is equal to
You might be interested in
Solve the system by graphing.
igor_vitrenko [27]

Answer:

Hi There the correct answer is {x,y} = {-1,-10}  

 

System of Linear Equations entered :

  [1]    3x - y = 7

  [2]    4x - 2y = 16

Graphic Representation of the Equations :

   y + 3x = 7        -2y + 4x = 16  

 

 

Solve by Substitution :

// Solve equation [1] for the variable  y  

 

 [1]    y = 3x - 7

// Plug this in for variable  y  in equation [2]

  [2]    4x - 2•(3x-7) = 16

  [2]    -2x = 2

// Solve equation [2] for the variable  x  

  [2]    2x = - 2  

  [2]    x = - 1  

// By now we know this much :

   x = -1

   y = 3x-7

// Use the  x  value to solve for  y  

   y = 3(-1)-7 = -10  

Solution :

{x,y} = {-1,-10}  

Hope it helps!

8 0
3 years ago
Which value of y makes the equation true?<br> -2y - 9 =-11<br> A. -10<br> c.<br> 1<br> D.<br> 10
kow [346]

Answer:

all work is pictured and shown

3 0
3 years ago
In 2019-2020, North Carolina spent $10,632 per student. The per-pupil spending has decreased at 6% per year. If this continues,
nadezda [96]

Answer:

<em>The per-pupil spending will be approximate $8,300 in 4 years</em>

Step-by-step explanation:

<u>Exponential Model</u>

The exponential function is often used to model natural growing or decaying processes, where the change is proportional to the current quantity.

An exponential decaying function is expressed as:

C(t)=C_o\cdot(1-r)^t

Where:

C(t) is the actual value of the function at time t

Co is the initial value of C at t=0

r is the decaying rate, expressed in decimal

The statistics of the years 2019-2020 at North Carolina indicate initial spending of Co=10,632 per student. The decaying rate is r=6% = 0.06 per year, thus the exponential model is:

C(t)=10,632\cdot(1-0.06)^t

C(t)=10,632\cdot(0.94)^t

where t is expressed in years.

We are required to know the expected spending for t= 4 years. Substitute t=4:

C(t)=10,632\cdot(0.94)^4\approx 8,300

The per-pupil spending will be approximate $8,300 in 4 years

4 0
3 years ago
11. 5( y + 3.5) = -7.5 5 2.5​
Oksi-84 [34.3K]

Answer:

−

4

cot

(

−

45

)

cos

(

390

)

sin

(

330

)

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
I need a little help
MrMuchimi
The answer to this is (1,3,5)
8 0
4 years ago
Read 2 more answers
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