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zepelin [54]
3 years ago
11

Show your work AND the answer a research showed that 45% of sixth graders have dogs for pets 35% have cats 10% have fish and 5%

have birds and another 5% have reptiles If 30 sixth graders own birds, how many sixth graders were surveyed?
Mathematics
1 answer:
Arturiano [62]3 years ago
3 0

Answer: 600 students

Step-by-step explanation:

Of the total number of sixth graders who were surveyed, 5% owned birds.

This 5% translated to 30 students.

30 students is therefore 5% of the total number of sixth graders surveyed.

Assume that number to be x:

x * 5% = 30

x = 30 / 5%

= 600 students

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Match the amounts and tip or tax rates in the first column to the total costs in the second column.
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Answer:

1. $132.24

2. $55.89

3. $1336.66

4. $258.19

5. $57.86

Step-by-step explanation:

Simply use this equation.

\frac{InitialValue}{100} = \frac{x}{TaxPercentage}

Substitute in our values, using No.1 as our example.

\frac{123.01}{100}  = \frac{x}{7.5}

Cross multiply

922.575 = x100

Solve for x by dividing by 100.

x = 9.22575

Now add x to the initial value.

9.22575 + 123.01 = 132.23575

Round to the nearest hundredth for the answer.

$132.24

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Step-by-step explanation:

7 0
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Evaluate the expression when a=1/4 and b=6
mafiozo [28]

Answer:

-23

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A standard deck of cards contains 52 cards. One card is selected from the deck. ​(a) Compute the probability of randomly selecti
den301095 [7]

Answer:

a) 0.5

b) 0.75

c) 0.307  

Step-by-step explanation:

We are given the following information in the question:

Number of cards in a deck = 52

Formula:

\text{Probability} = \displaystyle\frac{\text{Number of favourable outcomes}}{\text{Total number of outcomes}}

a) P(Heart or Diamond)

Total number of hearts and diamonds in a deck = 13 + 13 = 26

P( Heart or Diamond) =

\displaystyle\frac{26}{52} = \displaystyle\frac{1}{2} = 0.5

b)  P(Heart or Diamond or Spade)

Total number of hearts, diamonds and spades in a deck = 13 + 13 + 13 = 39

P( Heart or Diamond or Spades) =

\displaystyle\frac{39}{52} = \displaystyle\frac{3}{4} = 0.75

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Total number of spades in a deck = 13

Number of 10 in a deck = 4

P( 10 or Spades) =

\displaystyle\frac{13 + 4 -1}{52} = \displaystyle\frac{16}{52} = \displaystyle\frac{4}{13} = 0.307

3 0
3 years ago
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