All categories

2 years ago

Please answer this simple question !!!

Mathematics

1 answer:

Nastasia [14]2 years ago

6 0

The final answer is (2,1).

Step 1: Solve for either x or y in one of the two equations.

x + 3y = 5
- 3y - 3y
----------------------
x = -3y + 5


Step 2: Substitute the expression you got for x into the opposite equation.

-3y + 5 - 3y = -1
  -6y + 5 = -1
   - 5 - 5
--------------------
-6y = -6
------ -----
-6 6

y = 1

Step 3: Plug in the solution you got for y into either of the 2 equations.

x + 3(1) = 5
  x + 3 = 5
  - 3 - 3
---------------
x = 2

You might be interested in

Can someone explain this to me please will give brainliest

KATRIN_1 [288]

The answer is A. for this, you have to set up a system of equations. the first one will be the area equation. since you know area=length x width, your equation will be LxW=50. the next equation is L=2W, since the length is two times the width. then, plug in 2W for the L in the other equation and you get 2W^2=50. divide by 2 and get W^2=25. square root both sides and you get W=5. plug back into the other equation to find L=10. Then, add the sides of the rectangle for the perimeter. 10+5+10+5=30.

3 0

2 years ago

How do I solve this problem? Please help

Westkost [7]

9n + 6 = 456
9n = 456 - 6
9n = 450
n = 450/9
n = 50

I believe this is the answer, though i'm not sure.

8 0

3 years ago

Read 2 more answers

I need help solving -23<1-4x-8

Elan Coil [88]

Answer is x is less than 4

7 0

2 years ago

(25x)°=(22×+9)° whas the answer

goldfiish [28.3K]

Answer:

x = 3

Step-by-step explanation:

(25x)° = (22x + 9)° Divide each side by 1°

25x = 22x + 9 Subtract 22x from each side

3x = 9 Divide each side by 3

x = 3

<em>Check: </em>

(25× 3)° = (22×3 + 9)°

75° = (66 + 9)°

75° = 75°

3 0

3 years ago

Your cell phone plan charges a base charge each month plus a charge per daytime minute of usage and December used 510 daytime mi

algol13

Answer:

In February, 423 daytime minutes is used

Step-by-step explanation:

Let the base plan charges be x

And cost per daytime minute be y

In December,

x + 510y = 92.25------------------(1)

In January,

x + 397y = 77.56---------------------(2)

Subtracting eq(2) from eq(1)

x + 510y = 92.25

x + 397y = 77.56

-------------------------------

0 + 113y = 14.69

-------------------------------

y = \frac{14.69}{113}

y = 0.13----------------------------------(3)

Substituting (3) in (1)

x + 510(0.13) = 92.25

x + 66.3 = 92.25

x = 92.25 - 66.3

x = 25.95

So In February

base plan + (daytime minute)(cost per daytime minute) = 80.9

25.95 + (daytime minute)(0.13) = 80.9

(daytime minute)(0.13) = 80.9 - 25.95

(daytime minute)(0.13) = 54.95

(daytime minute) = $\frac{54.95}{0.13}$

daytime minutes = 422.69

daytime minute $\approx 423$

3 0

3 years ago