3 years ago

If d stands for the diameter of a circle and r stands for the radius of a circle, then:

Mathematics

1 answer:

ivolga24 [154]3 years ago

5 0

A. d=2r ....................

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April wants to paint three walls of her bedroom. The walls are each 90 square feet. Paint is only sold in whole quarts, and each

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Answer:

she should buy 3 quarts and keep the remainder which can possibly cover 30 square feet.

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3 years ago

La Sra.Elena y el Sr.Eulalio,abortan taxis diferentes de la misma empresa el costo del servicio es un importe fijo de salida (ba

atroni [7]

Answer:

$ 30

$ 20

Step-by-step explanation:

Sea el costo fijo xy el costo por km sea y suponiendo que es el mismo para ambos taxis.

De la pregunta obtenemos las dos ecuaciones

$x+8y=190\quad ...(i)$

$x+5y=130\quad ...(ii)$

Aplicando $(i)-(ii)$

$8y-5y=190-130\\\Rightarrow 3y=60\\\Rightarrow y=\dfrac{60}{3}\\\Rightarrow y=20$

Sustituyendo en $(ii)$

$x+5y=130\\\Rightarrow x+5\times 20=130\\\Rightarrow x=130-100\\\Rightarrow x=30$

Entonces, el costo fijo es de $ 30 y el costo por km es de $ 20.

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3 years ago

Y=(x-1)(x+7)<br> what are the x-intercepts?

Juli2301 [7.4K]

X-int.= = 1, -7

What can be found in parentheses in an equation like this one is switched to positive or negative.

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3 years ago

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tangare [24]

There's no picture up

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4 years ago

The average price of a movie ticket in the United States from 1980 to 2000 can be modeled by the expression 2.75+0.10x, where x

Trava [24]

Answer:

2.75

Step-by-step explanation:

0.10 represents the rate at which prices have increased since 1980..

2.75 represents the price in 1980

This can be confirmed by inputting 0 as the value of x.

2.75+0.10(0) = 2.75

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3 years ago