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lesantik [10]
3 years ago
5

There are 8 boys and 7 girls and 195 in All

Mathematics
1 answer:
valkas [14]3 years ago
3 0
Then there are 210 people since 8+7+195 = 210
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Help me please !
zhenek [66]
X=7 y =9 so answer is first one (7,9)
6 0
3 years ago
If the 9th term of an A.P is 0, prove that its 29th term is twice its 19th term
Ghella [55]

Let the first term, common difference and number of terms of an AP are a, d and n respectively.

Given that, 9th term of an AP, T9 = 0 [∵ nth term of an AP, Tn = a + (n-1)d]

⇒ a + (9-1)d = 0

⇒ a + 8d = 0 ⇒ a = -8d ...(i)

Now, its 19th term , T19 = a + (19-1)d

= - 8d + 18d [from Eq.(i)]

= 10d ...(ii)

and its 29th term, T29 = a+(29-1)d

= -8d + 28d [from Eq.(i)]

= 20d = 2 × T19

Hence, its 29th term is twice its 19th term

6 0
3 years ago
Read 2 more answers
Find the area and circumference.
saveliy_v [14]

Answer:

  • area ≈ 176.7 cm²
  • circumference ≈ 47.1 cm

Step-by-step explanation:

The radius is half the diameter, so is ...

  r = d/2 = 15 cm/2 = 7.5 cm

The area formula is ...

  A = πr²

Filling in the radius, we have ...

  A = π·(7.5 cm)² = 56.25π cm² ≈ 176.7 cm² . . . area

__

The circumference formula is ...

  C = πd

Filling in the diameter, we have ...

  C = π·(15 cm) = 15π cm ≈ 47.1 cm . . . circumference

5 0
4 years ago
A page election results can hold r results. One polling location had 5r+15 results While the second had 3r-4 results Write and s
stiv31 [10]

<u>Answer:</u>

Total number of result at two polling location in a page election is represented by expression 8r + 11.

<u>Solution:</u>

Given that a page election result can hold r result.

Number of result at one polling location = 5r + 15  

Number of result at second polling location = 3r - 4

Need to write simplified expression for total number of results at two polling location.

<em>Total number of results at two polling location</em> = Number of result at one polling location + Number of result at second polling location

=> Total number of results at two polling location = (5r + 15) + (3r - 4) = 8r + 11  

Hence total number of result at two polling location is represented by expression 8r + 11.

4 0
4 years ago
Solve for systems of equations <br><br> 2x-2y=0 <br> X+3y=-9
Stells [14]

Answer:

Point Form

(- 9/4,- 9/4)

Step-by-step explanation:

5 0
3 years ago
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