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Thepotemich [5.8K]

3 years ago

14

Find two rational numbers such that the sum of the first and three times the second is 5 and the sum of second and two times the

first is 8.
A. (x,y) = (16/5,-2/5)
B. (x,y) = (-17/5,-2/5)
C. (x,y) = (-16/5,-2/5)
D. (x,y) = (19/5, 2/5)
E. (x,y) = (-19/5, 3/5)

1 answer:

masha68 [24]3 years ago

7 0

Answer: E. (x,y) = (-19/5, 3/5)

Step-by-step explanation:

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Is amount off an increase or decrease

Mashutka [201]

Decrease because you taking something off of something

7 0

3 years ago

Monthly spending : $46,$62,$63,$57,$50$42$56$40 its median, mode and range

ozzi

Mean = $52
median = $53
no mode
range = 63 - 40 = $23

6 0

3 years ago

Se vende2 usb en 60 soles cada uno. En una se ganó el 20% y en la otra se perdió el 20% ¿Se ganó o se perdió en total y cuánto?

aniked [119]

Voy a responder en el mismo idioma en que está la pregunta.

1) Venta con ganancia

Precio de venta 60 soles.

Ganancia = 20% del costo => costo + 0,20 * costo = precio

=> costo (1 + 0,20) = precio = 60 soles

=> costo (1,20) = 60 soles => costo = 60 soles / 1,20 = 50 soles

2) Venta con pérdida del 20%

Pérdida = 20% del costo

=> costo - precio = 20% * costo => costo - 0,20*costo = precio

=> costo ( 1 - 0,20) = 60 soles => costo * 0,80 = 60 soles

=> costo = 60 soles / 0,80 = 75 soles

3) Costo total = 50 soles + 75 soles = 125 soles

4) Ganancia total = valor total de venta - costo total

Ganancia total = 2 * 60 soles + 125 soles = 120 soles - 125 soles = - 5 soles.

El signo negativo significa que al final se perdió 5 soles en la operación.

8 0

4 years ago

Does anyone know how to do this (#2) PLZZZZ HELPPPPPPPP

timurjin [86]

Answer:

a.- slope= 36

Interpretation : The cable car travels 36 meter per minute

b.- y = 36x + 100

c.- 640 meters

Step-by-step explanation:

a.-

Find slope using the slope formula : $\frac{y2-y1}{x2-x1}$

Plug in the two given points: $\frac{1000-100}{25-0}$

Subtract the numbers : $\frac{900}{25}$

Reduce the fraction : 36

b.-

Using the given y-interspet (100) and the slope create an equation: y = 36x + 100

c.-

Using the equation you created plug in 15 for x to find the

distance: y = 36 (15) + 100

Multiply the numbers : y = 540 + 100

Add the numbers : y = 640

8 0

3 years ago

511 = -7 (10x – 13)<br> steps

PilotLPTM [1.2K]

Answer: $x=-6$

<u>Simplify both sides of the equation</u>

<u></u> $511=(-7)(10x)+(-7)(-13)(Distribute)\\511=-70x+91$ <u></u>

<u></u>

<u>Flip the equation</u>

<u></u> $-70x+91=511$ <u></u>

<u></u>

<u>Subtract 91 from both sides</u>

<u></u> $-70x+91-91=511-91\\-70x=420$ <u></u>

<u></u>

<u>Divide both sides by -70</u>

<u></u> $-70x/70=420/-70\\x=-6$ <u></u>

3 0

3 years ago

Read 2 more answers