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MAVERICK [17]
3 years ago
14

If a phone card is used to make a long distance phone call, you are charged $0.50 per call plus an additional $0.31 per minute.

Part A: Write an equation that can be used to find the total cost of a phone call that lasts for m minutes. Part B: Shalon was charged $5.15 after using a phone card to make a phone call. For how many minutes did he talk on the phone? Show your work.
Mathematics
1 answer:
Nikitich [7]3 years ago
7 0

Part A: c for cost. c=0.31m+0.5

0.31m is the cost per minute. 0.5 is cost per call.

Part B: 0.31m+0.5=5.15 to solve we must rearrange.

subtract 0.5 from each side giving us 0.31m=4.85

divide by 0.31 giving us m=15.65

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Enter the value of a and b that complete the sum: 3/x + 5/x^2 = ax+b/x^2
Aleksandr [31]

Answer:

a=\frac{3}{x^{2} }

b=5

Step-by-step explanation:

we are given

\frac{3}{x} }+\frac{5}{x^{2} }=ax+\frac{b}{x^{2} }

we will compare both sides of equaion

 \frac{b}{x^{2} }=\frac{5}{x^{2} }

comparing both sides we get

b=5

and

\frac{3}{x} }=ax

a=\frac{3}{x^{2} }

hence

a=\frac{3}{x^{2} }

and   b=5

4 0
4 years ago
1. An amusement park has 18 rides, 30 games, and 8 water slides. Write each ratio in simplest form
kramer

Answer:

a) the ratio for games to rides is 30:18 and 5:3 in simplest form

b) the ratio for rides to water slides 18:8 and 9:4 in simplest form

c) the ratio for water slides to games is 8:30 and 4:15 in simplest form

6 0
3 years ago
If 5x = 2y and y = 10, what does 7x equal
MAXImum [283]

Answer:

28

Step-by-step explanation:

5x= 2×10

X=20/5= 4

7x= 7×4= 28.

Please mark as brainliest.

5 0
4 years ago
Read 2 more answers
A baseball player had 4 hits in 8 games. At this rate, how many hits will the baseball player have in the next 28 games?
hoa [83]

Answer:

14

Step-by-step explanation:

I would say 14 because if you multiply 8 by 3 it would equal 24. And that is just below 28. Then, I tried to see if 8 x 4 would work, but that equaled 32. And both of those numbers are in between 28. So, if I multiplied 8 by 3 to get 24, I also multiplied the 4 by 3 which equals 12. So, I would say it would be 14.

4 0
3 years ago
Only need help on number 5 and 6
Alborosie

5) since (x-a)^2+(y-b)^2=r^2

plug in (-5,2) as (a,b) and r=3

Making the equation:

(x+5)^2+(y-2)^2=9

6) (x-0)^2+(y-0)^2=r^2

since we have (0,5)

0^2+5^2=r^2

Final equation: x^2+y^2=25

5 0
3 years ago
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