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Serggg [28]
4 years ago
10

plz help its urgent i will rate brainliest Your actual height: ___154.cm__________ Your height in the picture: 10cm The height o

f the object in the picture: 13cm Your guess of the actual height of the object: 170cm Show your calculations to determine the actual height of the object. The actual height of the object:
Mathematics
1 answer:
sattari [20]4 years ago
6 0

Answer:

The actual height of the object is 200.2 cm

Step-by-step explanation:

The parameters given are;

The actual height = 154 cm.

The height in the picture = 10 cm.

The height of the object = 13 cm

The scale of the picture is 154 is to 10 or 154:10 which is equivalent to 77:5

Therefore the scale of the actual object height to the image height = 77:5

Where the image of the object = 13 cm

Let the height of the actual object = X, then we then have;

\dfrac{77}{5} = \dfrac{X}{13}

X = 13 \times \dfrac{77}{5} = \dfrac{1001}{5} = 200\frac{1}{5}  \ cm = 200.2 \ cm

The actual height of the object = 200.2 cm.

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Huixian needs to pack 171 pens 63 pencils and 27 erasers find the number of each item in a gift bag
Natasha2012 [34]

Answer:

19 pens, 7 pencils, 3 erasers

Step-by-step explanation:

Huxian needs to pack 171 pens

63 pencils

27 erasers

Hence the items can be divided in 9 bags

171/9

= 19

63/9

= 7

27/9

= 3

They can be packed in each bags as follows

19 pens

7 pencils

3 erasers

3 0
3 years ago
Give two coterminal angles (one positive and one negative) and the reference angle -4 pi/5
kherson [118]

The coterminal angle for the -4π/5  are -14π/5 , 6π/5 and reference angle is π/5 respectively.

<h3>What is coterminal angles?</h3>

Two different angles that have the identical starting and ending edges termed coterminal angles however, since one angle measured clockwise and the other determined counterclockwise, the angles' terminal sides have completed distinct entire rotations.

We have an angle:

-4π/5

To find the coterminal angle, add and subtract by 2π in the angle -4π/5

Coterminal angle:

= -4π/5 - 2π

= -14π/5

= -4π/5 + 2π

= 6π/5

Reference angle:

= π - 4π/5  (as the angle lies in the second quadrant)

= π/5

Thus, the coterminal angle for the -4π/5  are -14π/5 , 6π/5 and reference angle is π/5 respectively.

Learn more about the coterminal angles here:

brainly.com/question/23093580

#SPJ1

6 0
2 years ago
In the coordinate plane, what is the length of the line segment that connects points at (0, −1) and (−7, −2) ?
Mnenie [13.5K]
Distance formula!!!!! yay i've done this umpth manytimes today for people so if you dont know distance formula is square root of (x1-x2)^2+ (y1+y2)^2.
0-(-7) -1-(-2)
7^2 +   1^2
49+1
sqr. root of 50
appx. 7.07 or the closest to it
7 0
3 years ago
Read 2 more answers
Whats the area of a square that is 9m and 9m?
siniylev [52]

Answer:

81 m².

Step-by-step explanation:

To find the area of a square, you will simply need to do the side-length squared, or A= l^{2}.

If the side-length is 9, we can do:

A = 9²

A = 81 m²

6 0
4 years ago
Read 2 more answers
The scale of a map is 1:50000. A lake on the map is 6.16cm². find the actual area of the lake in hectares.
Mamont248 [21]

Answer:

1.54 [km²].

Step-by-step explanation:

1) the given scale is for linear functions, the given area of the lake is quadratic function. According to this

2) actual area = given area *50000 *50000;

3) the given area=0.000616 [m²],

the actual area=0.000616*50000*50000=1540000 [m²] or 1.54 [km²].

6 0
3 years ago
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