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Sonja [21]
4 years ago
8

Gina has $72 in $1 bills, $5 bills, and $20 bills. If she has three times as many $1 bills as she has $5 bills, and only half as

many $20 bills as $5 bills, how many of each type of bill does each have?
Mathematics
1 answer:
Hoochie [10]4 years ago
6 0
Total number of bills Gina has = $72
Let the number of $5 bills =X
Number of $1 bills = 3X
Number of $20 bills = X/2
Then
X+3X+X/2=72
4X+X/2=72
8X/2+X/2=72
9X/2=72
X=72*2/9
X=16
So
The number of $5 bills = 16
The number of $1 bills = 48
The number of $20 bills = 8
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4 0
3 years ago
An ornithologist has 4 bird feeders at separate locations. She wonders if birds are equally likely to visit each of the feeders.
Marianna [84]

Answer:

the x² test statistic 13.71

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Step-by-step explanation:

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the x² test statistic = ?

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X^2_{stat = [ (60 - 75)² / 75 ] + [ (90 - 75)² / 75 ] + [ (92 - 75)² / 75 ] + [ (58 - 75)² / 75 ]

X^2_{stat = [ 3 ] + [ 3 ] + [ 3.8533 ] + [ 3.8533 ]

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7 0
3 years ago
Help is very much appreciated.
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Answer:

5 + 5 =10

Step-by-step explanation:

it should have been 4 +6 = 10

3 0
3 years ago
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