3 years ago

Please help! I’m stuck on this

Mathematics

1 answer:

adelina 88 [10]3 years ago

6 0

Answer:

i don’t see anything

Step-by-step explanation:

did you write something? because i can’t see it.

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Rearrange the formula to make x the subject.<br><br> y = x -5

poizon [28]

Answer:

$x=y+5$

Step-by-step explanation:

$y=x-5$

$y+5=x$

$x=y+5$

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3 years ago

I really need help on this please.<br><br>3x+4y=36 y=-0.5x+8 substitution

Lena [83]

Answer:

Step-by-step explanation:

3x+4(-0.5x+8)=36

3x-2x+32=36

X=36-32

X=4

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3 years ago

Find the Surface area and volume of this squared-based pyramid

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Volume: 94.2 cm^3

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4 years ago

Z x z x z x z x z what's this?

Leya [2.2K]

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3 years ago

Find the values of m for which the lines y=mx-2 are tangents to the curve with equation y=x^2-4x+2

deff fn [24]

Let y= mx-2 be the tangent line to y=x^2-4x+2 at x=a.

Then slope, $m=\frac{dy}{dx} at x=a = 2a-4.$

Hence the equation is y=(2a-4)x-2

Let's find y-coordinate at x=a using tangent line and curve.

Using tangent line y at x=a is (2a-4) a -2 $=2a^{2}-4a-2$

Using given curve y-coordinate at x=a is $a^{2}-4a+2$

Let's equate these 2 y-coordinates,

$2a^{2} -4a-2 = a^{2} -4a+2$

$2a^{2}-a^{2} = 2+2$

$a^{2}=4$

a=2 or -2.

If a=2, $m=2a-4 = 2*2-4=0$

If a=-2, $m= 2(-2)-4 = -8$

Hence m values are 0 and -8.

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4 years ago