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Olenka [21]
3 years ago
8

The length of the shadow of a building is 100 meters

Mathematics
2 answers:
podryga [215]3 years ago
6 0
Check the picture below.

make sure your calculator is in Degree mode.

Mice21 [21]3 years ago
4 0
Ok we can do it now

tan 45 = h / 100

h = 100 tan45  = 100*1 = 100 m

answer is 100m


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Elaine has three types of nuts, peanuts, cashews and almonds, that she combines and stores in a large container: There are three
wlad13 [49]

Answer:

There are 9 ounces of peanuts

Make the ounces of cashews equal to three, and this works! Don’t know the math otherwise :|

8 0
2 years ago
A parabola has a focus of F(2, -0.5) and a directrix of y=-1.5 P(x,y) represents any point on the parabola, while D(x, -1.5) rep
prohojiy [21]
The sketch of the parabola is attached below

We have the focus (a,b) = (2, -0.5)
The point P(x,y)
The directrix, c at y=-1.5

The steps to find the equation of the parabola are as follows

Step 1
Find the distance between the focus and the point P using Pythagoras. We have two coordinates; (2, -0.5) and (x,y).
We need the vertical and horizontal distances to find the hypotenuse (the diagram is shown in the second diagram).
The distance between the focus and point P is given by
\sqrt{ (x-a)^{2}+ (y-b)^{2} }

Step 2
Find the distance between the point P to the directrix c. It is a vertical distance between y and c, expressed as y-c

Step 3
The equation of parabola is then given as 
\sqrt{ (x-a)^{2}+ (y-b)^{2} }=y-c
(x-a)^{2}+ (y-b)^{2}= (y-c)^{2} ⇒ substituting a, b and c
(x-2)^{2}+ (y--0.5)^{2}  = (y--1.5)^{2}
(x-2)^{2}+ (y+0.5)^{2}= (y+1.5)^{2}⇒Rearranging and making y the subject gives

y= \frac{ x^{2} }{2} -2x+1

7 0
3 years ago
A line passes through the point (9,-7) and has a slope of 4/3
lara31 [8.8K]

Answer:

y+7 = 4/3(x-9)

Step-by-step explanation:

Point slope form of an equation of a line is

y-y1 = m(x-x1) where (x1,y1) is the point and m is the slope

y--7 = 4/3(x-9)

y+7 = 4/3(x-9)

7 0
3 years ago
Read 2 more answers
What is the value of x?​
goblinko [34]

Answer:

3+3+x=30

x=30-9

21 is the answer

6 0
3 years ago
What is the answer to 3+2(2+1)
ra1l [238]

answer:

9 po

explanation:

:)

5 0
2 years ago
Read 2 more answers
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