All categories

3 years ago

Use the Echelon Method 1. Solve x + 3y = 7 3x + 4y = 11

Mathematics

1 answer:

Ludmilka [50]3 years ago

5 0

Answer:

x = 1 y = 2

Step-by-step explanation:

x + 3y = 7

- Subtract x from both sides.

3y = -x + 7

- Divide both sides by 3 to isolate the variable.

y = -1/3x + 7/3

- Plug the value of y into the other equation.

3x + 4(-1/3x + 7/3) = 11

3x - 4/3x + 28/3 = 11

- Add like terms.

5/3x + 28/3 = 11

5/3x = 5/3

x = 1

- Plug the value of x into the equation.

x + 3y = 7

(1) + 3y = 7

3y = 6

y = 2

You might be interested in

Someone help me please thank you

UkoKoshka [18]

It will take him 8 hours

6 0

3 years ago

Read 2 more answers

Can anyone think of Think of a quadratic equation that has two (2) real number solutions? If you can, please write the equation

serious [3.7K]

$1( 1) {}^{2} + 1(1) - 2 = 0$

1(2)^2+3(2)-10 = 0

4 0

3 years ago

Solve each inequality then graph the solution

Artist 52 [7]

Answer:

a is x>3

b is _> x/4 +12

c is x>-3

Step-by-step explanation: hope this helps

4 0

2 years ago

What is another way to name angle 3?

fiasKO [112]

Answer:

intimately there are three types of angles a cute angle and angle between zero and 90° right angle and angle 90 degree angle of two angle and angle between 90 and 180 degree

7 0

1 year ago

The table shows the values of a function f(x).

QveST [7]

Answer:

The average rate of change is $=-4$

Step-by-step explanation:

The average rate of change from x=a to x=b of f(x) is given by;

$=\frac{f(b)-f(a)}{b-a}$

We want to find the average rate of change of the function represented in the table from x=-2 to x=2.

$=\frac{f(2)-f(-2)}{2--2}$

From the table f(-2)=25 and f(2)=9

The average rate of change from x=-2 to x=2 is

$=\frac{9-25}{2--2}$

$=\frac{-16}{4}$

$=-4$

3 0

3 years ago