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anzhelika [568]

3 years ago

5

Your monthly phone bill is $133.74 and you by 0.25 per mintute your phone cost 9.99 per month. Find the number of mintutes you u

sed

1 answer:

Sever21 [200]3 years ago

6 0

133.74-9.99=123.75
123.75/.25=495

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A function is expressed by the equation y=0.3x−6. For what value of the independent variable will the value of the function be e

Anna11 [10]

Answer:

0; 10; 20

Step-by-step explanation:

x is the independent variable

y is the dependent variable

y is dependent on x

a) For what value of the independent variable will the value of the function be equal to −6

y=0.3x−6

-6 = 0.3x-6

0=0.3x

x = 0

Therefore, if the independent variable is 0, the value of the function will be -6.

b) For what value of the independent variable will the value of the function be equal to −3

y=0.3x−6

-3 = 0.3x-6

0.3x = -3+6

0.3x = 3

x = 3/0.3

x = 10

Therefore, if the independent variable is 10, the value of the function will be -3.

c) For what value of the independent variable will the value of the function be equal to 0.

y=0.3x−6

0=0.3x-6

6 = 0.3x

x = 6/0.3

x = 20

Therefore, if the independent variable is 20, the value of the function will be 0.

7 0

3 years ago

A 2 kg metal cylinder is supplied with 1600J of energy to heat it from 5°C to 13°C. What is the specific heat capacity of the me

Neporo4naja [7]

Answer:

$c = 100\,\frac{J}{kg\cdot ^{\circ}C}$

Step-by-step explanation:

According to the First Law of Thermodynamics, the heat received by the metal cylinder is equal to the change in the internal energy. That is:

$Q = \Delta U$

$Q = m \cdot c \cdot \Delta T$

The specific heat is clear in the previous expression and finally computed:

$c = \frac{Q}{m\cdot \Delta T}$

$c = \frac{1600\,J}{(2\,kg)\cdot (13^{\circ}C-5^{\circ}C)}$

$c = 100\,\frac{J}{kg\cdot ^{\circ}C}$

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3 years ago

If a mitochondrion is 2 micrometers in length how long is it in nanometers? in millimeters? be able to show your work.

DENIUS [597]

When converting to milimeter from micrometer you will divide by 1000. i.e

7 0

3 years ago

Please help as soon as possible thank you

musickatia [10]

Answer:

what do you need help with

Step-by-step explanation:

?

3 0

3 years ago

If y varies directly with x, find the value of y when x = 27 for the direct variation with the given information. y = 7 when x =

ElenaW [278]

Given:

y varies directly with x,

It is given that y = 7 when x = -9.

To find:

The value of y when x = 27 for the direct variation.

Solution:

It is given that y varies directly with x, so

$y\propto x$

$y=kx$ ...(i)

Where, k is the constant of proportionality.

It is given that y = 7 when x = -9. Putting these values in (i), we get

$7=k(-9)$

$-\dfrac{7}{9}=k$

Putting $k=-\dfrac{7}{9}$ in (i), we get

$y=-\dfrac{7}{9}x$

Putting $x=27$ , we get

$y=-\dfrac{7}{9}(27)$

$y=-21$

Therefore, the required value is $y=-21$ .

3 0

2 years ago