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3 years ago

15

i a man even number beetween 50 and 99 i am a multiple of 9 my tens digit is 5 more than my units digit

1 answer:

vodomira [7]3 years ago

6 0

Hello,
multiple of 9 betheen 50 and 99 are :54,63,72,81,99
and 54,72 are even.
5-4=1 and not 5
7-2=5 ok

72 is the number searched.

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Step-by-step explanation:

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Debnil has 6 teaspoons of salt. The ratio of teaspoons to tablespoons is 3:1. How many tablespoons of salt does Debnil have?

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Step-by-step explanation:

Given,

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Step-by-step explanation:

The given parametric equation is;

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<h3><u>BY ELIMINATING THE PARAMETER</u></h3>

To eliminate the parameter we make $t$ the subject in one equation and put it inside the other.

We make $t$ the subject in $x=6+ln(t)$ because it is easier.

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$t={e}^{x-6}$

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We have now eliminated the parameter.

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$y-y_1=m(x-x_1)$

where the gradient function is given by;

$\frac{dy}{dx}=2e^{2(x-6)}$

We substitute $x=6$ into the gradient function to obtain the gradient.

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The equation of the tangent becomes

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We simplify to obtain

$y=2x-12+4$

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$x=6+ln(t),y=t^2+3$

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$\frac{dx}{dt}=\frac{1}{t}$

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$\frac{dy}{dt}=2t$

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$\frac{dy}{dx}=\frac{\frac{dy}{dt} }{\frac{dx}{dt} }$

$\frac{dy}{dx}=\frac{2t }{\frac{1}{t} }$

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$0=\ln(t)$

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$1=t$

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$4-3=t^2$

$1=t^2$

$t=\pm1$

But the slope is the same when we plug in any of these values for t.

$\frac{dy}{dx}=2(\pm1)^2=2$

The equation of the tangent becomes

$y-4=2(x-6)$

We simplify to obtain

$y=2x-12+4$

$y=2x-8$

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3 years ago