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3 years ago

А

Mathematics

2 answers:

Tpy6a [65]3 years ago

6 0

Answer:

angle abc=125°

.......................

shutvik [7]3 years ago

4 0

Answer:

125

Step-by-step explanation:

Using the angle addition postulate,

Parts of an Angle add up to form a new angle with the measure of that angle is the sum of the two separate angles.

Add ABD and DBC

 $65 + 60 = 125$ 

ABC=125

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If (×)=×-4 wht does f(3) represent

mario62 [17]

Answer:

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3 years ago

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Find the tangent line equation of the curve at the given point. Y=arcsin(7x) at the point where x=sqrt2/14

Mumz [18]

Answer:

$Y-\frac{\pi}{2} =\frac{\pi}{2} (x+\sqrt{\frac{1}{7}})$

Step-by-step explanation:

The equation of the curve is

$Y = sin^{-1}(7x)$

To find the equation of tangent we need to differentiate this equation w.r.t x

So, differentiating we get

$Y'=\frac{7}{\sqrt{1-49x^2} }$

This would give the slope of the tangent line at any given point of which x coordinate is known. In the present case it is $x = \sqrt{\frac{1}{7} }$

Then slope would accordingly be

$Y'=\frac{7}{\sqrt{1-49/49} }$

= ∞

For, $x = \sqrt{\frac{1}{7} }$ , $Y = sin^{-1}(7/7)= \pi/2$

Equation of tangent line, in the point slope form, would be $Y-\frac{\pi}{2} =\frac{\pi}{2} (x+\sqrt{\frac{1}{7}})$

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3 years ago

Annabelle is taking the Polar Express ALL the way to the North Pole! The Polar Express is 100 meters long and it takes 30 second

vlada-n [284]

Hey!

Hope this helps...

~~~~~~~~~~~~~~~~~~~~~~~~~~~~

To solve this, we will be doing a semi-alternate route, but it will get us to our answer...

400 / 100 = 4

30 / 4 = 7.5 seconds

60 * 60 * 7.5 = 27,000 meters per hour

Lets plug it into our meters to miles formula...

27,000 / 1,609.344 ~ 16.777 miles per hour

So...

The answer is: The Polar Express was going 27,000 meters per hour (or roughly close to 16.777 miles per hour)...

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3 years ago

(-2,-4) ;m =3 in point slope form please

zalisa [80]

$\huge\boxed{y+4=3(x+2)}$

Point-slope form is $y-y_1=m(x-x_1)$ , where $m$ is the slope and $(x_1,y_1)$ is a point on the line.

Substitute in the values. $y-(-4)=3(x-(-2))$

Simplify the negative subtraction to addition. $\boxed{y+4=3(x+2)}$

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3 years ago

⚠️How do I solve this in descending order⚠️

Pani-rosa [81]

Rational. There’s nothing further that you can do with this problem

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3 years ago