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3 years ago

How do I write an equation for #17?

Mathematics

2 answers:

Svetllana [295]3 years ago

8 0

16.95x + .05y = 22.95x + .02y

Tanya [424]3 years ago

5 0

let's say we have two phone companies, A and B, A charges $16.95 monthly and $0.05 a minute, B $22.95 monthly and $0.2 a minute.

company A

1 minute...................... $16.95 + 0.05(1)

2 minutes.................... $16.95 + 0.05(2)

3 minutes.................... $16.95 + 0.05(3)

x minutes.................... $16.95 + 0.05(x)

company B

1 minute...................... $22.95 + 0.02(1)

2 minutes.................... $22.95 + 0.02(2)

3 minutes.................... $22.95 + 0.02(3)

x minutes.................... $22.95 + 0.02(x)

when will the cost of each plan be the same? well, that happens when 16.95 +0.05x = 22.95 + 0.02x.

$\bf \stackrel{A}{16.95+0.05x}=\stackrel{B}{22.95+0.02x}\implies 0.05x-0.02x=22.95-16.95
\\\\\\
0.03x=6\implies x=\cfrac{6}{0.03}\implies x=200$

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kotykmax [81]

Answer:

2(5-7)

Step-by-step explanation:

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3 years ago

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zhuklara [117]

Answer:

C)(5, 125), (6, 216)

Step-by-step explanation:

Well firstly, there's no actual way to know. There could be anything there, as for any n pairs (x, y) with distinct x-s, there exists a (n-1 or less)-degree polynomial that models them perfectly, and infinitely many polynomials of degree n (or more).

If we input those terms to a polynomial interpolator, we'll get an answer every time.

With this one, it will be the right answer though!

But to be serious, let's find out what the numbers are. We can notice they're all cubic numbers.

There's 1, which is 1^3, then theres 2^3, then it's 3^3, then 4^3.

It's reasonable to expect that we are expected to assume (x, x^3) is the rule.

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3 years ago

What’s the correct answer for this question?

Fantom [35]

Answer:

A and B

Step-by-step explanation:

1) Distance to the focus

From (x,y) to the focus(2,-4) {using distance formula}

=√(x-2)²+(y+4)²

2) Distance to the directrix

Is, y+p where P here is (-6)

d2 = y+p

= y+(-6)

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3 years ago

if fifty cents is divided equally among three friends there will be some cents left how many cents will be left

HACTEHA [7]

Greetings!

This can be solved by dividing 50 by 3 (the amount of friends, you're spiting the money with.)

50/3=16.6667

We have to round down in order to get a whole number: 16

16*3=48
50-48=2

If 50 cents is divided equally among three friends, each would get 16 cents and there would be 2 cents left over.

Hope this helps.
-Benjamin

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4 years ago

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Scilla [17]

Answer:

$t - 9$

Step-by-step explanation:

Given that t represents a number which is unknown to us, the difference of the number and 9 can be expressed algebraically as:

$t - 9$ .

The difference of t and 9 = $t - 9$ .

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3 years ago