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Alinara [238K]
3 years ago
5

7) The ratio of boys to girls in a class is 2:3. If there are 18 boys in the class, how

Mathematics
1 answer:
VikaD [51]3 years ago
7 0

Answer:

27

Step-by-step explanation:

Boys to girls is 2:3

and there are 18 boys so that means the 2 in 2:3 is actually 18

and 2 x 9 = 18 , so you would need to also multiply 3 by 9.

3 x 9 = 27

18:27

there are 27 girls

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miss Akunina [59]

Answer:

The measure of angle A is 115°

Step-by-step explanation:

we know that

The sum of the internal angles of a triangle must be equal to 180 degrees

so

∠C+∠A+∠B=180°

substitute values and solve for x

x°+(3x-35)°+(x-35)°=180°

5x°=180°+70°

x=250°/5=50°

Find the measure of angle A

∠A=(3x-35)°

substitute the value of x

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3 years ago
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Answer:

=51.63 m^2

Step-by-step explanation:

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Then find the area of the semi circle, which is 1/2 the area of the circle

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Add the areas together for the total area

7.5+30+14.13

=51.63

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2 years ago
Round these numbers to the nearest (I) 10 (ii) 100 (iii) 1000 (a) 948 (b) 1855 (c) 199 (d) 645 (e) 19897
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3 years ago
Can someone pleaseeee hellpp??
monitta

Answer:

5.8

Step-by-step explanation:

To get the mean, add up all the numbers

9+4+8+3+5 = 29

Then divide by how many numbers there are (5)

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3 years ago
Tim and Stacy are volunteers who are helping with the town marathon. They're expecting 260 participants, but only 156 has have r
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Answer:

45%

Step-by-step explanation:

hope it helps,

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3 years ago
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