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Oksi-84 [34.3K]

2 years ago

14

How to use graphing to find the solutions to the system of equations?

1 answer:

gayaneshka [121]2 years ago

6 0

Once ur lines are graphed, the solution is where the lines intersect. So by graphing however many equations u have, the point where they intersect is the solution....unless of course u have parallel lines, then there is no solution. And if ur lines are coincident, the same line on top of each other, then there is infinite solutions.

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Need help solving this problem down below.

Veronika [31]

Answer:

1 / We have the area of a rectangle ABCD = 8 x 16 = 128 ft²

2 / Find the area of an isosceles Δ DEF:

The base of the isosceles ΔDEF => DF = DC- FC = 16 -12 = 4 ft

So the area of Δ DEF = 1/2 (DF x EH) = 1/2 (4 x 6) = 12 ft²

3 / Area of the irregular shape = area ABCB + Area DEF = 128 + 12 = 140 ft²

Step-by-step explanation:

3 0

2 years ago

Line Equation from Two Points

Verdich [7]

Hi!

We can use <u>point-slope form </u>to solve this.

$y-y_{1} =m(x -x_{1})$

$y_{1}$ <em> and </em> $x_{1}$ <em> will be from one of the points.</em>

<u>First, we have to find </u> $m$ <u>, the slope. We can use the slope equation to get this.</u>

$\frac{y_{1} -y_{2} }{x_{1} -x_{2} }$

<em>Plug in your points:</em>

$\frac{4-0}{8-(-8)} =\frac{4-0}{8+8} =\frac{4}{16} =\frac{1}{4}$

Your slope is $\frac{1}{4}$

<u><em>Now plug points and slope into point-slope equation. We will use (8, 4).</em></u>

$y-4=\frac{1}{4} (x-8)$

Now, if you want to get it into y = mx + b form, you have to solve for y:

$y-4=\frac{1}{4} (x-8)$

$y-4=\frac{1}{4} x-2$

$y=\frac{1}{4} +2$

Your equation is $y=\frac{1}{4} +2$

<u><em>For more information on how to get the equation of a line when given two points, see here:</em></u>

brainly.com/question/986503

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1 year ago

3x + 12+ 9x - 72<br><br><br>Solve?

Reil [10]

Answer:

12x - 60

Step-by-step explanation:

$3x+12+9x-72\\=3x+9x+12-72\\=12x+12-72\\=12x-60$

5 0

1 year ago

It is given that 3/7 , 12/m and n/49 are equivalent fractions. Find the value of ‘m’ and ‘n’.

denis23 [38]

Answer:

m=28

n=21

Step-by-step explanation:

3×4=12

7×4=28

28×1.75=49

12×1.75=21

4 0

2 years ago

Erin is experimenting with a simple electrical circuit. When she connects a light bulb to a battery, the light bulb begins conve

Shtirlitz [24]

<span>how much heat energy did the light bulb give off? </span>21

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2 years ago