3 years ago

3x-y=-7 2x + 3y

TexFormula1" title="3x - y = - 7 \ \\ 2x + 3y = 12" alt="3x - y = - 7 \ \\ 2x + 3y = 12" align="absmiddle" class="latex-formula">

Mathematics

1 answer:

Zolol [24]3 years ago

6 0

X=1 y=2.5 I’m not sure if that’s correct but I hope it is.

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The length of a rectangle is 6 feet longer than its width. If the perimeter of the rectangle is 56 feet, find its length and wid

alexira [117]

2(6+x) + 2x=56
12+4x=56
-12 -12
4x=44
÷4 ÷4
x=11

The measure of the width is 11ft
and the measure of the length is:
11+6=17ft

6 0

3 years ago

Graph the line of the equation 8x/5 - 2y = -8 using its slope and y-intercept

satela [25.4K]

Answer:

$y=\frac{4}{5}x+4$

Step-by-step explanation:

You'll need to get this equation in slope-intercept form by solving for y. I do a little extra here to get it in the correct form, but I think it's pretty clear. Let me know if I need to clarify.

$\\\\\frac{8x}{5}-2y=-8\\\\-2y=-\frac{8x}{5}-8\\\\2y=\frac{8x}{5}+8\\\\y=\frac{4}{5}x+4$

Once it's in slope-intercept form, both the slope and the y-intercept are readily available so you can easily graph it. I graphed both of them in the attached image so you can see that they are the same line.