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Alexxx [7]
3 years ago
11

1. A box of 80 coins, consisting of only nickels and dimes, is worth 7 dollars and 80 cents. Find the number of nickels.

Mathematics
1 answer:
RideAnS [48]3 years ago
5 0

Answer:

  1. 4 nickels
  2. 60 mph

Step-by-step explanation:

1. If all were dimes, the value would be $8.00. The value is actually $0.20 less than that. Replacing a dime by a nickel decreases the value by $0.05, so there must be $0.20/$0.05 = 4 nickels.

2. The total of the two speeds is the rate of closure: (420 mi)/(4 h) = 105 mi/h. The speed of the second car is found by subtracting the speed of the first car from this total:

  105 mph - 45 mph = 60 mph

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lbvjy [14]

\frac{c}{2}  - 3 +  \frac{6}{d }  =  \\  =  \frac{14}{2}  - 3 +  \frac{6}{3}  =  \\  = 7 - 3 + 2 =  \\ =  6
7 0
4 years ago
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Hitman42 [59]

Answer:

1.6 kids

2.6

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Step-by-step explanation:

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4 0
3 years ago
Identify the solution and graph of the given inequality. 34 &gt; 3(2 − x)
zloy xaker [14]

Answer:

x > 28/3

Step-by-step explanation:

34 > 3(2 − x)

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Sorry I don't know how to graph here, but I can graph it by writing the way it can be graphed.

It is in slope intercept form; y = mx + b

where mx is the slope and b is the y-intercept;

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And b is 0; which means at 0 where the slope will be applied, go up 28 times and to the right 3 times.

Hope this helps!

Good luck.

3 0
4 years ago
How does one explain how to graph a point on the coordinate grid?
Neko [114]

Answer:

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Hopefully this helps :)

8 0
3 years ago
I need all 5 of them please
aliina [53]
1.) 8.88= 4.44 (x -7)
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39.96 / 4.44x
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4 0
3 years ago
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