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erik [133]
3 years ago
11

PLEASE HELP ME GUYS!!

Mathematics
1 answer:
Softa [21]3 years ago
8 0

Answer:

n=20

Step-by-step explanation:

S_{n} =\frac{n(a_{1}+a_{n})}{2}\\\\1260 =\frac{n(25+101)}{2} \\\\n = 20

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I need help and can you please give me the answers as well appreciate it
EastWind [94]

I honestly need help with this

5 0
3 years ago
Simplify the expression 17y-2x+3(3x-y)+2x
Marat540 [252]

Answer:

9x+14y

Step-by-step explanation:

First Multiply the number outside of the brackets with the numbers inside the brackets. Ex:3 x 3x and 3 x -y

17y-2x+3(3x-y)+2x

That should get you to this.

17y-2x+9x-3y+2x

Next combine like terms.

14y+9x

Hope this helps!

5 0
3 years ago
Hey i need some help ill give you brainest 2. Ms. Juhal was making t-shirts. One of the designs had the instructions to make poi
liubo4ka [24]

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8 0
3 years ago
BCALLE can u help me please
Ksivusya [100]
17. RQ is the same as PS.
PS = -1 + 4x
RQ = 3x + 3
-1 + 4x = 3x + 3
4x = 3x + 4
x = 4
Now plug that into RQ.
3(4) + 3 = RQ
15 = RQ

18. Angles G and E are equal to each other.
G = 5x - 9
E = 3x + 11
5x - 9 = 3x + 11
5x = 3x + 20
2x = 20
x = 10
Plug that x into G.
5(10) - 9
41 = G

19. TE and EV are equal to each other.
TE = 4 + 2x
EV = 4x - 4
4 + 2x = 4x - 4
2x = 4x - 8
-2x = -8
x = 4
Plug that into TE.
4 + 2(4)
12 = TE

20. DB and BF are equal.
DB = 5x - 1
BF = 5 + 3x
5x - 1 = 5 + 3x
5x = 6 + 3x
2x = 6
x = 3
Plug that into DB.
5(3) - 1
14 = DB
4 0
3 years ago
Giving brainlist to whoever answers
AURORKA [14]

Answer:

false

Step-by-step explanation:

False

5(9)(3.2)

45*3.2=144

Hope this helps :)

6 0
2 years ago
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