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Eduardwww [97]
3 years ago
10

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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366.7424164 feet

Step-by-step explanation:

330x160

Use pythag theorem

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330²+160²=c²

c=366.7424164 feet

5 0
2 years ago
A bag contains 6 red apples and 6 yellow apples. A sample of 3 apples is drawn. Find the probability that the sample contains mo
lys-0071 [83]

Answer: 21/44

Step-by-step explanation:

Given that:

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Probability that sample contains more red than yellow :

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Prob of RRR = (6/12)(5/11)(4/10)= 120 / 1320

Prob RRY = (6/12)(5/11)(6/10)= 150/1320

Prob RYR is (6/12)(6/11)(5/10)= 180/1320

Prob YRR is (6/12)(6/11)(5/10)=180/1320

120/1320 + 150/1320 + 180/1320 +. 180/1320 = 630/1320 =126/264 = 42/88 = 21/44

3 0
3 years ago
The matrix C=[1,-2_-3,7] was used to encode a phrase to [7,-28,-25,-35,-2_-21,107,90,123,17]. Find C^-1 and use it to decode the
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C=  \left[\begin{array}{cc}1&-2\\-3&7\end{array}\right]  \\ C^{-1}= \left[\begin{array}{cc}7&2\\3&1\end{array}\right]  \\ \left[\begin{array}{cc}7&2\\3&1\end{array}\right] \times   \left[\begin{array}{ccccc}7&-28&-25&-35&-2\\-21&107&90&123&17\end{array}\right]  \\ =\left[\begin{array}{ccccc}49-42&-196+214&-175+180&-245+246&-14+34\\21-21&-84+107&-75+90&-105+123&-6+17\end{array}\right] \\ =\left[\begin{array}{ccccc}7&18&5&1&20\\0&23&15&18&11\end{array}\right]
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3 years ago
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Im the diagram shown JKL~ MNP. Find MP and PN.
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Step-by-step explanation:

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