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4 years ago

What is the system of solution x+y=18 and y=-4x

Mathematics

2 answers:

anzhelika [568]4 years ago

7 0

The system of solution is at the point (-6,24)

Assoli18 [71]4 years ago

4 0

First, we need to figure out y. Y has to be 4 times smaller than x. Y cannot be a decimal, and y cannot exceed 3. If x is 24, negative 4 x would be -96. Y would be -96, and -96 plus 24 is -72. So we need x to be smaller. if x is

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Help on one last question! :D

MariettaO [177]

A. -2/5 go down 2 so it's -2 and then over 5 -2/5

8 0

3 years ago

PLS<br> HELP MEEEEEEEEEEEEEEEEEEE

I am Lyosha [343]

$\qquad \qquad\huge \underline{\boxed{\sf Answer}}$

Here's the solution ~

Let's find the gradient of the shown line, using coordinates of any two points on it, like I'm gonna use (0 , 2) and (1 , -1)

Use the following equation :

$\qquad \sf \dashrightarrow \: gradient = \dfrac{y_2 - y_ 1}{x_2 - x_1}$

$\qquad \sf \dashrightarrow \: g = \dfrac{2 - ( - 1)}{0 - 1}$

$\qquad \sf \dashrightarrow \: g = \dfrac{2 + 1}{ - 1}$

$\qquad \sf \dashrightarrow \: g = - 3$

Hence, the gradient = -3 for the given line ~

6 0

3 years ago

Read 2 more answers

What is the inverse function of f(x)=7x-2

____ [38]

The inverse is f^-1(x) = 2/7 + x/7

7 0

4 years ago

What is the first term in a geometric sequence if the common ratio is −4 and the sum of the first four terms is −255?

posledela

Sn=A1(1-r^n)/(1-r)
Sum of a finite geometric series formula
We know the sum, number of terms and rate, so you plug those in.
-255=A1(1-(-4)^4))/(1-(-4)
-255=A1(1-256)/5
-255=A1(-255)/5
-1275=A1(-255)
5=A1

Hope this helped! Let me know if you have any questions.

8 0

3 years ago

Please please use explanation with answer

KIM [24]

Answer:

$\large\boxed{\theta=-\dfrac{\pi}{4}+k\pi\ or\ \theta=k\pi}\ for\ k\in\mathbb{Z}$

Step-by-step explanation:

$\tan^2\theta+\tan\theta=0\\\\\tan\theta(\tan\theta+1)=0\iff\tan\theta=0\ \vee\ \tan\theta+1=0\\\\\tan\theta=0\Rightarrow \theta=k\pi\ \text{for}\ k\in\mathbb{Z}\\\\\tan\theta+1=0\qquad\text{subtract 1 from both sides}\\\\\tan\theta=-1\Rightarrow\theta=-\dfrac{\pi}{4}+k\pi\ \text{for}\ k\in\mathbb{Z}$

5 0

3 years ago