How many solutions does this system have ? - 15x=-5y+40 y=-3x+8

Mathematics

1 answer:

Mumz [18]2 years ago

3 0

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Suppose the base and height are each multiplied by 1/2 what effect should this have on the area

Zina [86]

It would be 1/4 of the original area, as you have just multiplied by 1/2 twice. 1/2 times 1/2 equals 1/4.

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3 years ago

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I need help with this thanks

Ierofanga [76]

Answer:

2:15 to 2:18 is -225 ft

Step-by-step explanation: -40 ft-185=-225 ft

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2 years ago

can u tell me what this is plz, I think I have worked it out but don't know if it is right: decrease £60 by 20%

aalyn [17]

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3 years ago

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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:

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