What is 3x+2y=8 answer

Mathematics

2 answers:

Aneli [31]3 years ago

8 0

3 x + 2y=8= 0 thats the answer bro

son4ous [18]3 years ago

7 0

3x + 2y = 8

<h3>3/2x + y = 4</h3><h3>y = 4 - 3/2x</h3><h3><u>y = -3/2x - 4</u></h3><h3>are you trying to find the y-intercept?</h3><h3>if you are the answer is (0, -4)</h3><h3>(I will also recommend using the website desmos.com) </h3><h3>(It's a graphing calculator) i really have benefited from using desmos it is so easy to use. add me: duhitz.litty03 </h3>

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A 5 foot tall person walks away from a 12 foot tall lamppost at a constant rate of 4 feet per second. What is the rate that the

erastovalidia [21]

Solution :

Given :

The height of the person is 5 foot.

The height of the lamppost is 12 foot.

Speed of the person away from the lamppost = 4 ft/s

Let the distance of the tip of the shadow of the perosn to the pole at t seconds after the person started walking away from the pole be d(t).

By similarity of the triangles, we see that

$\frac{12}{d}=\frac{5}{x}$ .................(i)

Here x is the distance from the person to the tip of the shadow. As it is given the speed of the person is 4 ft/s, then the distance of the person from the pole 4t. So we have,

x = d - 4t .............(ii)

Putting (ii) in (i) and solving for d is

d(t) = 6.85 t

So now if we derive d(t), we will get the wanted rate of the tip of the shadow.

∴ d'(t) = 6.85 ft/s