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8090 [49]
3 years ago
7

During one month of cell phone use, Noah used 200 anytime minutes and 400 text messages, and paid $80.00. The next month, he use

d 150 anytime minutes and 350 text messages, and paid $67.50. Which statement is true? Each text message costs 5 cents more than each anytime minute. Each anytime minute costs 10 cents more than each text message. A text message and an anytime minute each cost 25 cents. Each text message costs double the amount of an anytime minute.

Mathematics
2 answers:
saw5 [17]3 years ago
6 0

Answer:

A

Step-by-step explanation:

Troyanec [42]3 years ago
5 0
200x+400y=80
150x+350y=67.5

200x+400y=80
200x=80-400y
x=0.4-2y
150(0.4-2y)+350y=67.5
60-300y+350y=67.5
50y=7.5
y=0.15 or 15 cents per text
200x+400y=80
200x+400(0.15)=80
200x+60=80
200x=20
x=0.1 or 0.10 per minute
So each text costs 5 cents more than each anytime minute

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Which scenario best matches the linear relationship expressed in the equation y=-14+1700
Elden [556K]

Question:

Which scenario best matches the linear relationship expressed in the equation y = –14x + 1,700?

1) Kent has $1,700 in his bank account and spends $14 each week.

2) Kent has $1,700 in his bank account and deposits $14 each week.

3) Kent had $1,700 in his bank account and deposited another $14.

4) Kent has $14 in his bank account and spent $1,700.

Answer:

Option  1) Kent has $1,700 in his bank account and spends $14 each week.

Step-by-step explanation:

Let x denote the number of weeks.

Option 1: Kent has $1,700 in his bank account and -14x as the negative sign denotes how much amount he spend each week.

Thus, Option 1 is the correct answer.

Option 2: Kent has $1,700 in his bank account and deposits $14 each week.

Writing it as equation, we have, y=14x+1700 which is not the expressed linear equation.

Hence,  Option 2 is not the correct answer.

Option 3: Kent had $1,700 in his bank account and deposited another $14.

Writing it as equation, we have, y=14+1700 which is not the expressed linear equation.

Hence,  Option 3 is not the correct answer.

Option 4: Kent has $14 in his bank account and spent $1,700.

Writing it as equation, we have, y=14-1700 which is not the expressed linear equation.

Hence,  Option 4 is not the correct answer.

Thus, the scenario that matches the linear equation relationship expressed in the equation is Option 1.

The answer is Kent has $1,700 in his bank account and spends $14 each week.

4 0
3 years ago
Emily collected this data about the number of miles she ran each day for ten days. She wants to keep track of the distance she r
notka56 [123]
Monday 10 and Saturday 5!!!
8 0
4 years ago
Read 2 more answers
A certain radioactive isotope has leaked into a small stream. Four
Xelga [282]
Ok so

for a thing that is P amount at first, with a half life of k days
after t days, the amount left is A

the equation is
A=P( \frac{1}{2})^{ \frac{t}{k} }

given
13% of P remained=A
t=400

replace A with 0.13P and t with 400


0.13P=P( \frac{1}{2})^{ \frac{400}{k} }
divide both sides by P
0.13=( \frac{1}{2})^{ \frac{400}{k} }
take the ln of both sides
ln0.13=( \frac{400}{k})ln \frac{1}{2}}
multiply both sides by k
kln0.13=400ln \frac{1}{2}}
divide oth sides by ln0.13
k=\frac{400ln \frac{1}{2} }{ln0.13}
evaluate
k=135.897 days


the half life is 135.897 days

5 0
3 years ago
Which of the following is the equation represented from the graph?
Vesna [10]

Answer:

y=2x

Step-by-step explanation:

x=1.5

1.5x2=3

thats it ithink so

8 0
3 years ago
Example of a geometric mean between 2 numbers?
aleksklad [387]
<h3>ANSWER</h3>

<u>geometric mean of n numbers </u>

= ( product of n numbers)^n

=>where n belongs to set of positive integers

we require for n = 2

Let us take numbers 4 and 8

so, geometric mean between 4 and 8

given by, => ( 4×8)^(1/2)

=> ( 2 × 4 )^(1/2 ×2)

=> 2×4

=> 8

hope it helps you

3 0
3 years ago
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