All categories

3 years ago

2x + 5y = 14 4x + 2y = -4 solving with elimination

Mathematics

2 answers:

melamori03 [73]3 years ago

8 0

Answer:

(- 3, 4 )

Step-by-step explanation:

2x + 5y = 14 → (1)

4x + 2y = - 4 → (2)

multiplying (1) by - 2 and adding to (2) will eliminate the x- term

- 4x - 10y = - 28 → (3)

add (2) and (3) term by term to eliminate x

0 - 8y = - 32

- 8y = - 32 ( divide both sides by - 8 )

y = 4

substitute y = 4 into either of the 2 equations and solve for x

substituting into (1)

2x + 5(4) = 14

2x + 20 = 14 ( subtract 20 from both sides )

2x = - 6 ( divide both sides by 2 )

x = - 3

solution is (- 3, 4 )

m_a_m_a [10]3 years ago

6 0

Answer: $x=-\frac{3}{179} =\\-0.016759777\\y=-\frac{142}{179} =\\-0.793296089$

Step-by-step explanation: steps using substitution

You might be interested in

Which relation is a function?]<br> NO LINKS

GrogVix [38]

Answer:

first one

Step-by-step explanation:

use the vertical line test, and the first one is a quadratic function

6 0

3 years ago

Read 2 more answers

What is the slope?

Andrei [34K]

Select any two coordinates from the graph such as (7,4) and (9,7). The formula of slope is rise/run or y2-y1/x2-x1
(4-7/(7-9)=(-3)/(-2)= 1.5
The slope of the graph is 1.5!

6 0

4 years ago

The slope of the line below is to use the corners of the labeled point to find a point slope equation of the line.

dexar [7]

Answer: Choice A) y - 10 = 2(x - 3)

============================================================

Explanation:

We can rule out choices C and D because this diagonal line has a positive slope (as it moves uphill when moving to the right).

So m = 2 must be the slope.

---------

Recall that

y - y1 = m(x - x1)

represents the point slope form of a linear equation.

The point shown on this graph is (3,10) meaning that x1 = 3 and y1 = 10 pair up together.

So,

y - y1 = m(x - x1)

y - 10 = 2(x - 3)

which points to <u>choice A</u> as the final answer

4 0

3 years ago

6.875- Negative (-1/4)

kherson [118]

Answer:

7.125

Step-by-step explanation:

$6.875 - (-\frac{1}{4})$

Two negatives multiply to give a positive and thus we can remove the parenthesis

$6.875 +\frac{1}{4}$

Converting fractions to decimals.

$6.875+0.25$

=7.125

7 0

3 years ago

Math 7a using number sense to solve equations

Anika [276]

Simple...

you have: $\frac{n}{3} =12
$

and

$\frac{n}{3} =-12$

To solve for.... $\frac{n}{3} =12$

Multiply to remove the denominator-->>

$3* \frac{n}{3} =12*3$

n=12*3

n=36

Then-->>>

$\frac{n}{3} =-12$

Do the same thing-->>

$3* \frac{n}{3} =-12*3$

n=-12*3

n=-36

Thus, your answer.

6 0

4 years ago

2x + 5y = 14 4x + 2y = -4 solving with elimination​

2x + 5y = 14 4x + 2y = -4 solving with elimination