Question

Help!!!!! plz ill award as brainliest

A piggy bank contains $2.65 in nickels and dimes. If the number of nickels is 7 less than three times the number of dimes, how many of each kind of coin are there?

A traveler covered 4/5 of his journey with bicycle and the rest of the distance on foot. If the whole journey was 160 km, how much distance did he cover on foot?

Answer 1

Answer:

x = 12 dimes and 3x-7 = (3*12)-7 = 29 nickels in the piggy bank

Step-by-step explanation:

Hope this helps

Answer 2

Answer:

see below

Step-by-step explanation:

1.

total = $2.65 = d + n

let d = dimes

   n = nickels

nickels = 3d - 7

plugin values into the formula:

2.65 = d + 3d - 7

2.65 + 7 = 4d

d = 9.65

       4

d = $2.41

nickels = 3d - 7

             = 3(2.41) - 7

          n = $0.24

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2.

since Cindy ate 30, less than Ann and Ben together so, the equation is

7x = 5x + 5x - 30

7x - 10x = -30

x = 30/3

x = 10

ann   5 x 10 = 50

ben   5 x 10 = 50

cindy 7 x 10 = 70  

total            = 170