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bulgar [2K]
3 years ago
15

A certain smart phone family plan cost $55 per month plus additional usage cost if X is the number cell phone minutes used above

the plan amount and y is the number of megabytes of data used above the plan amount intercept The following expressions
A. 0.25x
B. 2y
C. 0.25x + 2y + 55
Mathematics
1 answer:
zvonat [6]3 years ago
5 0
I believe it would be c. because it is the only one to have to annual fee of $55.
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joja [24]

Answer:

C) $10,000 invested at 6.7% compounded quarterly over 7 years yields the greater return.

Step-by-step explanation:

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#Given n=7rs, P=10000, i=6.7%

i_m=(1+i/m)^m-1\\\\=(1+0.067/4)^{4}-1=0.06870\\\\\therefore A=P(1+i_m)^n\\\\=10000(1.06870)^7\\\\\approx \$15,921.75

Hence, the investment has the largest value($15,921.75) when the interest rate is compounded quarterly.

8 0
3 years ago
i need to subtract decimals. i have the answers I just need the work. problems 3.12- 2.52, 3.6-1.8 and 4.1 - 27. thank you
Snowcat [4.5K]

A way you can show work is just not use the commas then subtract then put the commas in when you're done. And, if the bigger number isn't as big or has as many numbers behind the decimal as the first one, add a zero at the end.

7 0
3 years ago
I need an answer for each instance!!! Each a, b, and c is a different mini problem.
user100 [1]
The answer would be c

7 0
3 years ago
Question -3+13x=9.
aalyn [17]

Answer:

-3+13x=9.

13x=9+3

13x=12

x=12/13

i proved it by putting value of x in reactant side you get product .

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3 years ago
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