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alukav5142 [94]
2 years ago
14

The bottom of a ladder must be placed 5 feet from a wall. The ladder is 18 feet long. How far above the ground does the ladder t

ouch the wall?
Mathematics
2 answers:
Setler79 [48]2 years ago
6 0

Answer:

The ladder meets the wall at 17.29 feet from the ground.

Step-by-step explanation:

Pythagorean Theorem ⇒ a^2 + b^2 = c^2

5^2 + b^2 = 18^2

25 + b^2 = 324

b^2 = 299

b = 17.291616

anygoal [31]2 years ago
6 0
13 feet pal now go get ‘em
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Graph the functions on the same coordinate axis. {f(x)=−2x+1g(x)=x2−2x−3
NikAS [45]

Answer:

(2,-3) and (-2,5)

Step-by-step explanation:

Let us graph the two equations one by one.

1. f(x)=-2x+1

If we compare this equation with the slope intercept form of a line which is given as

y=mx+c

we see that m = -1 and c =1

Hence the slope of the line is -2 and the y intercept is 1. Hence one point through which it is passing is (0,1) .

Let us find another point by putting x = 1 and solving it for y

y=-2(1)+1

y=-2+1 = -1

Let us find another point by putting x = 2 and solving it for y

y=-2(2)+1

y=-4+1 = -3

Hence the another point will be (2,-3)

Let us find another point by putting x = -2 and solving it for y

y=-2(-2)+1

y=+1 = 5

Hence the another point will be (-2,5)

Now we have two points (0,1) ,(1,-1) ,  (2,-3) and (-2,5) we joint them on line to obtain our line  

2.

g(x)=y=x^2-2x-3

y=x^2-2x+1-1-3

y=(x-1)^2-4

(y+4)=(x-1)^2

It represents the parabola opening upward with vertices (1,-4)

Let us mark few coordinates so that we may graph the parabola.

i) x=0 ; y=y=(0)^2-2(0)-3=0-0-3=-3 ; (0,-3)

ii)x=-1 ; y=(-1)^2-2(-1)-3=1+2-3=0 ; (-1,0)

iii) x=2 ; y=(2)^2-2(2)-3 = 4-4-3 =-3 ;(2,-3)

iii) x=1 ; y=(1)^2-2(1)-3 = 1-2-3 =-4  ;(1,-4)

iii) x=-2 ; y=(-2)^2-2(-2)-3 = 4+4-3 =5  ;(-2,5)

Now we plot them on coordinate axis and line them to form our parabola

When we plot them we see that we have two coordinates (2,-3) and (-2,5) are common , on which our graphs are intersecting. These coordinates are solution to the two graphs.

3 0
4 years ago
B + 5/14 <br><br> b = 5/7<br> please help
Tatiana [17]
5/7 + 5/14 = 1.07142857143

you can round that to 1.1
4 0
3 years ago
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A science fair poster is very rectangular 3 feet long and 2 feet wide what is the area of the poster in square inches
pantera1 [17]
You want to do base × height to get your answer
3×2 = 6
So the area of the poster is 6 sq in.


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8 0
3 years ago
Can someone give me the answers for these?
Alinara [238K]
I think the first one is ( C :3 ) and the other one is B 2
5 0
3 years ago
The owner of a local restaurant surveyed her staff on their preference of uniform color. The results are displayed in the table
nignag [31]

Answer:

A is the answer - sample 1 and sample 2 are most representative because they are the same answer.  

Step-by-step explanation:

3 0
3 years ago
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