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JulijaS [17]
3 years ago
9

A bag contains 120 marbles. Some are red and the rest are black.There are 19 red marbles for every black marble.How many red mar

bles are in the bag?
Mathematics
2 answers:
Vikki [24]3 years ago
7 0
There are 114 red marbles
charle [14.2K]3 years ago
6 0

Answer: The answer is 114.

Step-by-step explanation: Let 'n' be the number of black marbles in the bag.

Then, according to the question, there will be '19n' number of red marbles in the bag.

Since there are total 120 marbles in the bag, so we have

n+19n=120\\\\\Rightarrow 20n=120\\\\\Rightarrow n=6.

Therefore, Number of red marbles in the bag will be

19n=19\times 6=114.

Thus, there are 114 red marbles.

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In triangle ABC, D is the midpoint of side AC and E is the midpoint of side BC.
cestrela7 [59]

Answer:

14

Step-by-step explanation:

Since all sides are half of greater triangle.Then 7 × 2 = 14 is length of greater hypotenuse.

Suppose two triangles with similar conditions

1^2+1^2=2

Hypotenuse=2^1/2

We assume another triangle which is exactly double of previous triangle I.e

2^2+2^2=8

Hypotenuse=2×2^1/2

Which is exactly twice of previous triangle.

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8 0
3 years ago
SOMEONE PLSS HELP ASAP
VLD [36.1K]
The answer is most likely 8.
5 0
3 years ago
V^2 = u^2+ 2as<br>u = 12<br>a = -3 s = 18<br>Work out a value of v.​
Shkiper50 [21]

Answer:

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Step-by-step explanation:

6 0
3 years ago
15:40:25 in simplest form
Contact [7]

Answer:

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Step-by-step explanation:

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3 0
3 years ago
A yardstick casts a shadow of 24 in. At the same time a telephone pole casts a shadow of 20 ft 8 in. What is the height of the t
finlep [7]

Answer:

372 inches

Step-by-step explanation:

(1 yd = 36 in., and 1 ft = 12 in.)

1 yard stick = 24 in

This means , height of 36 inches casts a shadow of 24 Inches

At the same time a telephone pole casts a shadow of 20 ft 8 in

1 ft = 12 in

Hence,

Convey 20ft to inches

1 ft = 12 in

20 ft = 20 × 12 inches

= 240 inches

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Hence,

Height/Length of shadow = Height/Length of shadow

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Cross Multiply

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x = 36 × 248/24

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The height of the telephone pole, to the nearest inch is 372 inches

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