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iren2701 [21]
3 years ago
15

Need this in 3 mins, 30 points, will mark as Brainliest!!!! Solve:

Mathematics
1 answer:
Sergeeva-Olga [200]3 years ago
6 0

Answer:

The missing number is 4

Step-by-step explanation:

Given

21 x 39 x _____ x 19 divided by 12 = 5187

Required

Fill in the gap

Let the missing number be represented with y; So, the expression becomes

\frac{21 * 39 * y * 19 }{12} = 5187

Multiply both sides by 12

12 * \frac{21 * 39 * y * 19 }{12} = 5187 * 12

21 * 39 * y * 19 = 62244

Rearrange the expression on the left hand side

21 * 39 * 19 * y = 62244

15561 * y = 62244

Divide both sides by 15561

\frac{15561 * y}{15561} = \frac{62244}{15561}

y = \frac{62244}{15561}

y = 4

Hence, the missing number is 4

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1.Use Euler’s Formula to find the missing number. Edges: 40
PtichkaEL [24]

Answer:

Euler's Formula states that:

V -E +F = 2   meaning that the vertices minus the edges plus the faces of a convex polyhedron will always equal two.

So, for the initial question, we have 40 edges and 24 faces.

So, vertices = 2 + Edges -Faces

Vertices = 2 + 40 - 24

Vertices = 18

Source: https://www.1728.org/platonic.htm

Step-by-step explanation:

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3 years ago
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ruslelena [56]
A. 12pi meters.

Circumference = pi x diameter (pi x 12 = 12pi)
Diameter = 2 x radius (2 x 6 = 12)

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3 years ago
MATH HELP NEEDED PLEASE
Semmy [17]

Answer:

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Step-by-step explanation:

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6 0
2 years ago
in a roulette wheel there are 38 numbered slots: 36 slots are the numbers 1 through 36 and the remaining two slots are 0 and 00.
frez [133]

roulette consists in placing a small ball in a roulette wheel, Probability (Roulette ball not landing on red) = 10 / 19

The probability of an event can be calculated by probability formula by simply dividing the favorable number of outcomes by the total number of possible outcomes

Given:

Number of total slots = 38

Number of red slots = 18

Number of black slots = 18

Number of green slots = 2

Find:

Probability (Roulette ball not landing on red)

Computation:

Probability (Roulette ball not landing on red) = 1 - Probability (Roulette ball landing on red)

Probability (Roulette ball not landing on red) = 1 - (18 / 38)

Probability (Roulette ball not landing on red) = 20 / 38

Probability (Roulette ball not landing on red) = 10 / 19

To learn more Probability

Visit : brainly.com/question/17212536

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7 0
1 year ago
1. In the figure below ABC∡=153°, ABD∢=(5x+5)°, and DBC∢=(3x+12)°. Find the measure of ABD∢ and DBC∢. Show all work
vodka [1.7K]

By angle addition postulate,

m(∠ABD) + m(∠DBC) = m(∠ABC)

Now substitute the values of each angle,

(5x + 5)° + (3x + 12)° = 153°

Combine like terms of the expression,

(5x + 3x) + (5 + 12) = 153

8x + 17 = 153

8x = 153 - 17

x = \frac{136}{8}

x = 17

Substitute the value of 'x' to get the measure of each angle,

m(∠ABD) = (5x + 5)

                = 5(17) + 5

                = 90°

m(∠DBC) = (3x + 12)

                = 3(17) + 12

                = 63°

Learn more,

brainly.com/question/4838302

8 0
3 years ago
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