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Kruka [31]
3 years ago
15

Give the slope perpendicular to the equation 2x-y=5

Mathematics
1 answer:
nikklg [1K]3 years ago
4 0

Answer:

- \frac{1}{2}

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Given

2x - y = 5 ( subtract 2x from both sides )

- y = - 2x + 5 ( multiply through by - 1 )

y = 2x - 5 ← in slope- intercept form

with slope m = 2

Given a line with slope m then the slope of a line perpendicular to it is

m_{perpendicular} = - \frac{1}{m} = - \frac{1}{2}

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Which piece of information is listed in the income section of a tax return?
GuDViN [60]

Answer:

B dividends

Step-by-step explanation:

The rest are monies paid out.

5 0
3 years ago
If an item that costs $45 sold for a 15% discount, how much do you spend on it? Commission is a % of sales.
Stells [14]

Answer:

You pay $38.25 after the discount is applied

Step-by-step explanation:

First take 15% of 45 by multiplying 45 by 0.15 (which is 15% as a decimal)

0.15 * 45 = 6.75

Subtract 6.75 from $45 and then you get $38.25!

Hope this helps! Good luck on your courses!

8 0
3 years ago
Ana ha comprado libros, todos del mismo precio, por valor de 120 euros. El librero le regala 3 libros por lo que cada libro le c
lidiya [134]

Answer:

El primer paso será darle un nombre a nuestras variables:

x= Numero de libros comprados inicialmente

y=Precio inicial de los libros

Ahora analizamos el enunciado,

Lorena ha comprado libros todos del mismo precio por valor de 120 €

x*y=120 € (1)

El librero le regala 3 libros por lo que en realidad cada libro que cuesta 2 € menos

(x+3)(y-2)=120€ (2)

Tenemos entonces dos ecuaciones con dos incógnitas, así que podemos resolver,

Despejamos en (1)

x=120/y

Sustituimos en (2)

(120/y +3)(y-2)=120

120 - 240/y + 3y -6 =120

3y-240/y =120-120+6

3y -240/y =6

y- 80/y=6

y²-80=6y

y²-6y-80=0

Resolvemos la ecuación de segundo grado

a=1

b=-6

c=-80

Aplicando la resolvente,

(6+- √36+320)/2

6+-√356/2

(6+-18,86)/2

Como el valor de y no puede ser negativo la unica respuesta válida será:

y=12,43

Cada libro le costo 12,43€

Sustituyendo en (1)

x=120/12,43

x=9,65 como no puede ser un número racional

x=9

Lorena ha comprado 9 libros

6 0
3 years ago
What is the common difference in the arithmetic sequence 10, 8, 6, 4, ...?
jasenka [17]

Answer:

-2

Step-by-step explanation:

10-8=2

8-6=2

6-4=2

4-2=2

3 0
3 years ago
Read 2 more answers
Can someone please help me!!!!!!
zhannawk [14.2K]
No sé esta respuesta
3 0
3 years ago
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