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Lostsunrise [7]
3 years ago
5

O triplo de um mumero somado a 9 e igual a 30 .qual e esse numero

Mathematics
1 answer:
-Dominant- [34]3 years ago
7 0
Do you think than i ve understood it right 

3x+9=30

3x=21

x = 21/3 = 7

x = 7

hope helped 
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Please help!!
hichkok12 [17]

Answer:

15. X=23

16.<BCA=59

17. AD=8x-22

18. X=125

7 0
3 years ago
The third graders collected 754 cans the fourth graders collected 592 cans estimate how many more cans the third graders collect
MakcuM [25]
754 minus 592 is 162 so estimated to the tens would be 160.
8 0
3 years ago
Read 2 more answers
✨ B R A I N L I E S T
miv72 [106K]

1

:x

2

+y

2

−6x−9y+13=0

(x−3)

2

+(y−

2

9

)

2

−9−

4

81

+13=0

(x−3)

2

+(y−

2

9

)

2

=

4

65

Here,

r

1

=

2

65

C

1

=(3,

2

9

)

Equation of another circle-

S

2

:x

2

+y

2

−2x−16y=0

(x−1)

2

+(y−8)

2

−1−64=0

(x−1)

2

+(y−8)

2

=65

Here,

r

2

=

65

C

2

=(1,8)

Distance between the centre of two circles-

C

1

C

2

=

(3−1)

2

+(8−

2

9

)

2

C

1

C

2

=

4+

4

49

=

2

65

∣r

2

−r

1

∣=

∣

∣

∣

∣

∣

∣

65

−

2

65

∣

∣

∣

∣

∣

∣

=

2

65

∵C

1

C

2

=∣r

1

−r

2

∣

Thus the two circles touches each other internally.

Since the circle touches each other internally. The point of contact P divides C

1

C

2

externally in the ratio r

1

:r

2

, i.e.,

2

65

:

65

=1:2

Therefore, coordinates of P are-

⎝

⎜

⎜

⎜

⎜

⎜

⎛

1−2

1(1)−2(3)

,

1−2

1(8)−2(

2

9

)

⎠

⎟

⎟

⎟

⎟

⎟

⎞

=(5,1)

Therefore,

Equation of common tangent is-

S

1

−S

2

=0

(5x+y−6(

2

x+5

)−9(

2

y+1

)+13)−(5x+y−2(

2

x+5

)−16(

2

y+1

))=0

2

−6x−9y−13

+x+8y+13=0

4x−7y−13=0

Hence the point of contact is (5,1) and the equation of common tangent is 4x−7y−13=0.

4 0
2 years ago
Read 2 more answers
If you choose two blocks at the same time, what is the probability that both blocks will
Murljashka [212]

Step-by-step explanation:

Numer of events divided by total number of events.

number of events = two ( since T is only 2)

total number of events = 12 ( count all of them)

so the probability is = 2/12 which is = 1/6.

Hope this helps.

Good luck ✅.

6 0
2 years ago
(Pls help will give brainliest its urgent!!) Michael spends $24 each week on private swimming lessons.
vredina [299]

Answer:

i only know it is c and e but dont know about a and b

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
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