3 years ago

I kinda get this problem but i just want to see what other answers people got to see if i did the question wrong.

2 answers:

8 0

An=a1+d(n-1)
fisrst term is a1
common difference is d

decreases by 4 each time
first term is 19
an=19-4(n-1)
distribute
an=19-4n+4
an=23-4n
you are right

Ulleksa [173]3 years ago

3 0

You did not do the question wrong. Your answer would be correct. ;-)

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Factor completly 6c + 24

Vlad1618 [11]

6(c+4)
In order to solve this problem you need to divide both coefficients by 6 and factor the rest out.

6 0

3 years ago

Read 2 more answers

Silvio is an air-traffic controller who must calculate the altitude of an incoming plane. He sees the plane at an angle of eleva

Mrac [35]

Since the problem is not telling us the height of Silvio, we are going to assume it is not relevant for our calculations.
Let $h$ the altitude of the incoming plane. We know for our problem that the distance between Silvio and the tower is 3 miles, Also we know that the angle of elevation to the plane is 40°. With this information we can create a triangle as shown in the figure. We need a function that relates the angle of elevation with its opposite and adjacent sides, that function is tangent.
$tan \alpha = \frac{opposite.side}{adjacent.side}$
$tan(40)= \frac{h}{3}$
$h=3tan(40)$
$h=2.5miles$

We can conclude that we should use the trig function tangent to model this situation; also, we can conclude that the equation that describes this situation is $h=3tan(40)$ .