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Anvisha [2.4K]
3 years ago
7

Bob is trying to decide between two cell phone plans. Plan A has no flat fee, but the user must pay $10 cents per minute on the

phone. Plan B requires a one-time fee of $20 but only requires a payment of $5 cents per minute on the phone. What is the minimum whole number of minutes Bob has to use the phone for to make Plan B the cheaper plan?
PLZ HELP ASAP
Thanks
Mathematics
2 answers:
kramer3 years ago
6 0

Let x be the number of minutes that Bob anticipates using. Plan A costs 10x cents, while Plan B costs 2000 + 5x cents. We therefore have the inequality

2000+5x < 10x

2000 < 5x

400 < x.

The smallest integer x such that 400 < x is 401. Therefore, Bob must use at least <u>401</u> minutes to make Plan B cheaper.

professor190 [17]3 years ago
4 0
$ per min is a rate. you multiple by minutes to get dollars.

A = 10x
B = 5x + 20

set them equal to find minutes, x.

10x = 5x + 20
10x - 5x = 20
5x = 20

x = 4
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Answer:

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Step-by-step explanation:


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3 years ago
What is an equation of the line that passes through the points (4,-5) and (-2,7)
Korvikt [17]

Answer:

y = -2x + 3

Step-by-step explanation:

y2 - y1/ x2 - x1

7 - (-5) / -2 - 4

-2

The slope is -2.

To find the y-intercept, you need to plug the coordinates into the equation.

y = -2x + b

7 = -2(-2) + b

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5 0
3 years ago
Which must be true of a quadratic function whose vertex is the same as its y-intercept?
BaLLatris [955]

Answer:  Choice A

The axis of symmetry for the function is x = 0.

===========================================================

Explanation:

The vertex is on the axis of symmetry. Since the vertex is on the y axis, this means the y axis itself is the axis of symmetry. The y axis is represented by the equation x = 0. Every point on the y axis has an x coordinate of 0. Example points are (0,2) and (0,5).

This parabola may have 0 roots, 1 root, or 2 roots.

7 0
2 years ago
Help me Find the answer, Here's the question!
Gelneren [198K]
Because the answers are all in standard form, we can simply look for the intercepts of the graph.

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Solve both equations by dividing by their values:

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6 0
3 years ago
What is the pythagorean theorem?
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Easy,

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a^{2} + b^{2} = c^{2}

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and

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Example: have 1,2 for a triangle what is the third side?

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Then, just square root to find c.

\sqrt{5}=c

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5 0
3 years ago
Read 2 more answers
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