All categories

3 years ago

What should be the first step in adding these equation to eliminate y 12x - 2y = -1 + 4x + 6y =-4

Mathematics

1 answer:

barxatty [35]3 years ago

6 0

Answer:

See below

Step-by-step explanation:

<u>Assumed you need to solve the system:</u>

12x - 2y = - 1
4x + 6y = - 4

In order to solve this by elimination, triple the first equation and add the second one.

<u>It will make the coefficients of y same with opposite signs:</u>

-6y and 6y

When added together these cancel, leaving x as the only variable.

You might be interested in

Help please!!!!!!!!!!!!!!!

anygoal [31]

-1. hope that helps!

3 0

2 years ago

The adult height of a male is about 1.19 times his height at age 12. The adult height of a female is about 1.07 times her height

marissa [1.9K]

If you are 12 years old, just measure your own height, then multiply your height by 1.19 if you’re a male, or 1.07 if you’re a female.

6 0

3 years ago

Read 2 more answers

In Mr. Elliot's garden, 1 8 of the flowers are red, 1 4 of them are purple, and 1 4 of the remaining flowers are pink. If there

german

Answer:

Step-by-step explanation:

Given that:

Red flowers = 1/8

Purple = 1/4

(1/8 + 1/4) = (1 + 2) / 8 = 3/8

Fraction left :

1 - 3/8 =. 5/8

Pink flowers :

1/4 of fraction left ;

1/4 * 5/8 = 5/32

Number of pink flowers

Total number of flowers = 128

5/32 * 128

640 / 32

= 20

20 pink flowers

4 0

3 years ago

Equation of the line contains the points (-3,2) and (5,-5)

makkiz [27]

For this case we have that by definition, the equation of the line of the slope-intersection form is given by:

$y = mx + b$

Where:

m: It is the slope of the line

b: It is the cut-off point with the y axis

We have the following points through which the line passes:

$(x_ {1}, y_ {1}): (- 3,2)\\(x_ {2}, y_ {2}) :( 5, -5)$

So the slope is:

$m = \frac {y_ {2} -y_ {1}} {x_ {2} -x_ {1}} = \frac {-5-2} {5 - (- 3)} = \frac {-7} {5 + 3} = - \frac {7} {8}$

Thus, the equation of the line is of the form:

$y = - \frac {7} {8} x + b$

We substitute one of the points and find "b":

$2 = - \frac {7} {8} (- 3) + b\\2 = \frac {21} {8} + b\\b = 2- \frac {21} {8}\\b = \frac {16-21} {8}\\b = - \frac {5} {8}$

Finally, the equation is:

$y = - \frac {7} {8} x- \frac {5} {8}$

Answer:

$y = - \frac {7} {8} x- \frac {5} {8}$

6 0

2 years ago

Let m = 7.

Zolol [24]

32 is the answer to the problem

4 0

2 years ago

Read 2 more answers