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horrorfan [7]
3 years ago
5

Do the ratios 8/16 and 1/2 form a proportion?

Mathematics
1 answer:
son4ous [18]3 years ago
3 0

Answer:

yes

Step-by-step explanation:

They both equal to one half, which makes them proportional

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Figure A is a scale image of Figure B. What is the value of x?
Scilla [17]

Answer:

x = 5.4

Step-by-step explanation:

Multiply 7.2 by 3/4 to find the equivalent ratio.

6 0
3 years ago
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1. A bag contains 3 red marbles and 4 blue marbles. Two marbles are drawn at random without replacement.
Yakvenalex [24]
1. 3/7
2. 4/7
3. 4 in 52 or 1 in 13.
4. I don't know sorry
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3 years ago
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What is the approximate height of the tower in meters?
ivanzaharov [21]
Use similar triangles
distance of man from puddle = 0.5 m.
distance of puddle from tower = 13 - 0.5 = 12.5 meters
so we have 2 similar triangles
one has height 2 m and base 0.5 m and the other has height x m ( the tower) and base 12.5 m

Corresponding sides are in the same ratio, so

2 / x =  0.5 / 12.5

0.5x = 2*12.5 = 25

x = 25 / 0.5 = 50 m

The tower is approx 50 m high.
7 0
3 years ago
What is the solution for 3x – 2y = –9
Natasha_Volkova [10]

Answer: x=3-2y/3

Step-by-step explanation:

You just have to try to isolate one variable

8 0
3 years ago
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What two numbers have a product of -2 and a sum of 7
Citrus2011 [14]

<em>Greetings from Brasil...</em>

According to the statement of the question, we can assemble the following system of equation:

X · Y = - 2      i

X + Y = 7       ii

isolating X from i and replacing in ii:

X · Y = - 2

X = - 2/Y

X + Y = 7

(- 2/Y) + Y = 7     <em>multiplying everything by Y</em>

(- 2Y/Y) + Y·Y = 7·Y

- 2 + Y² = 7X     <em> rearranging everything</em>

Y² - 7X - 2 = 0      <em>2nd degree equation</em>

Δ = b² - 4·a·c

Δ = (- 7)² - 4·1·(- 2)

Δ = 49 + 8

Δ = 57

X = (- b ± √Δ)/2a

X' = (- (- 7) ± √57)/2·1

X' = (7 + √57)/2

X' = (7 - √57)/2

So, the numbers are:

<h2>(7 + √57)/2</h2>

and

<h2>(7 - √57)/2</h2>
7 0
3 years ago
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