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3 years ago

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You are deciding between two cell phone plans. Plan A: Unlimited text, talk, and data for $50 per month. Plan B: Unlimited text

and data and 100 minutes of talk for $40, plus $0.20 per minute of talk after 100 minutes. At how many minutes of talk are the plans equal?

1 answer:

Sergio039 [100]3 years ago

7 0

Sent a picture of the solution to the problem (s).

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3. A saving's account began with a balance of $250. The relationship between the number of

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The rate of change of the balance was $175 per deposit which is C

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Which property is best to use when determining the strength of an ionic bond in a solid?

Shtirlitz [24]

I think the best property to use is electronegativity since that is how much it attracts/wants electrons. The larger the difference in electronegativity is between two atoms, the stronger the ionic bond will be. This is also why two atoms need to have a minimum difference between the electronegativity to be considered ionic and not covalent.

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3 years ago

On a sunny day, Larry notices that his shadow is 24 inches long. If it is 74 inches from the top of his head to the end of the s

kicyunya [14]

Answer:

70 inches

Step-by-step explanation:

Larry forms a right triangle with the ground (this is one leg of a right triangle) and he is 24 inches from his shadow (this is the second leg).

74 inches is the hypotenuse of the right triangle

use pythagorean theorem: a^2 + b^2 = c^2

let h = Larry's height

h^2 + 24^2 = 74^2

h^2 + 576 = 5476

h^2 = 4900

h = sq rt 4900

h = 70

5 0

2 years ago

tim is choosing between two cell phone plans that same amount of free minutes. Cingular plane charges 39.99 per month with addit

VMariaS [17]

Answer:

100 minutes

Step-by-step explanation:

Let

x ----> the number of minutes

y ----> the total cost of the plan

we know that

<em>Cingular Plan</em>

$y=0.45x+39.99$ -----> equation A

<em>Verizon Plan</em>

$y=0.40x+44.99$ -----> equation B

To find out how many additional minutes will it take for the two plans to cost the same

Solve the system of equations A and B

Solve by graphing

Remember that the solution is the intersection point both graphs

using a graphing tool

The solution is the point (100,84.99)

see the attached figure

therefore

For x=100 minutes

The cost for both plans is $84.99

3 0

3 years ago

Express the following statements as a linear equation in two variables.

anygoal [31]

Answer:

(1) a + b = 34

(i) b = 1/2 f - 5

(m) B = 10 + 2S

(iv) 2p + 15b = 100

(v) Y + F = 200

(vi) yx + xy = 121

Step-by-step explanation:

* Lets explain how to solve the problem

(1)

∵ The sum of the two numbers is 34

- Let the first number is a and the second number is b

∴ a + b = 34

(i)

∵ The cost of a ball pen is 5 less than half the cost of a fountain pen

- That means the cost of the blue pen is less than the cost of the

fountain pen

- Let the cost of the ball pen is b and the cost of the fountain pen is f

∴ b = 1/2 f - 5

(m)

∵ Bhargavi got 10 more marks than double the marks of Sindhu

- That means the marks of Bhargavi is greater than the marks of Sindhu

- Let the marks of Bhargavi is B and the marks of Sindhu is S

∴ B = 10 + 2S

(iv)

∵ The cost of a pencil is $2 and a ball point pen is $15

∵ Sheela pays 100 for the pencils and pens she purchased

- Let the number of the pencils she purchased is p and the number

the ball point pen she purchased is b

∴ 2p + 15b = 100

(v)

∵ Yamini and Fatima together contributed 200 towards the Prime

Minister's Relief Fund

- Assume that Yamini contributed Y and Fatima contributed F

∴ Y + F = 200

(vi)

∵ The sum of a two digit number and the number obtained by

reversing the order of its digits is 121

∵ The digits in unit's and ten's place are 'x'and y'respectively

∴ The two digit number is yx and the number after reversing is xy

∴ yx + xy = 121

8 0

3 years ago