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ANEK [815]
3 years ago
7

5x+2.5=-20 solve x, show your steps

Mathematics
1 answer:
notka56 [123]3 years ago
5 0

Answer:

5x =  - 20 - 2.5 \\ 5x = −22.5 \\x =    \frac{ - 22.5}{ - 5}   \\ (x =  - 4.5) \times  - 1 \:  \:  \:  \: x \: can \: not \: be \: negative \\ x = 4.5

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What is 40.8 divided by 8
Shalnov [3]
40.8/8= just simply divide

40.8/8= 5.1

Now let's check

8*5.1= 40.8 so that's the correct answer!
3 0
3 years ago
Read 2 more answers
A circle has a sector with area 27 and central angle of 120
Alex_Xolod [135]

Answer:

81π

Step-by-step explanation:

-The sum of central angles in a  circle add up to 360°.

-Let x be the area of the circle.

-Given the area of a 120° is 27π, the circles area can be calculated as:

A=27\pi\\\\120\textdegree=27\pi\\360\textdegree=x\\\\\therefore x=\frac{360\textdegree\times 27\pi}{120\textdegree}\\\\=3\times 27\pi\\\\=81\pi

Hence, the area of the circle is 81π

6 0
3 years ago
In New York, state sales tax rates vary by county. In Allegany County, the sales tax rate is 8 1 2 %. A pair of shoes costs $29.
Liono4ka [1.6K]

Answer:

  • $1.19

Step-by-step explanation:

  • The tax is 8 1/2% = 8.5%
  • A pair of shoes = $29.99
  • A shirt = $15.99

<u>The difference in the cost:</u>

  • $29.99 - $15.99 = $14

<u>Tax on the difference:</u>

  • $14*0.085 = $1.19
5 0
3 years ago
Una compañía de danza de 156 bailarines hace una coreografía formando filas y columnas.Si en una fila hay 20 bailarines más que
Zigmanuir [339]

Responder:

Por favor, consulte la explicación.

Explicación paso a paso:

Dado lo siguiente:

Número de bailarines = 156

Sea número de bailarines en una columna = c

Número de bailarines seguidos = c + 20

Multiplicar el número de bailarines en fila y columna dará el número total de bailarines.

Por lo tanto,

c * (c + 20) = 156

c² + 20c = 156

c² + 20c - 156 = 0

c² + 26c - 6c - 156 = 0

c (c + 26) - 6 (c + 26) = 0

(c + 26) = 0 o (c - 6) = 0

c = - 26 o c = 6

C no puede ser negativo

Por lo tanto,

Número de bailarines en columna = 6

Número de bailarines en fila = 20 + 6 = 26

6 0
3 years ago
Calculus: Can anyone help me on this? ​
olasank [31]
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