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Novosadov [1.4K]
3 years ago
8

There are 4 times as many alligators as crocodiles. If the total number of alligators and crocodiles is 40, how many alligators

are there
Mathematics
1 answer:
Elena L [17]3 years ago
7 0
10
40=4x
x=aligators
4x10 is forty
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Fine the equation of the line that is perpendicular to the given line and passes through the given point. Enter the right side o
Kipish [7]

Answer:

y=-\frac{4}{7} x+\frac{55}{7}

Step-by-step explanation:

Change the given equation to slope-intercept to get y=\frac{7}{4}x-\frac{1}{4}. When you multiply the slopes of perpendicular lines, you get -1. -1 divided by \frac{7}{4} is -\frac{4}{7}. The slope of the new line is then -\frac{4}{7}. The perpendicular line passes through (5, 5) so you can have the equation5=-\frac{4}{7} (5)+b. Simplifying gets b = \frac{55}{7} . So now the final equation for the perpendicular line is y=-\frac{4}{7} x+\frac{55}{7}

6 0
3 years ago
Determine the domain
Aleonysh [2.5K]

Answer:

A

Step-by-step explanation:

3 0
3 years ago
What amount of money must Kurt Blixen invest at 4.75% to have it earn $10,000 in 90 days?
Westkost [7]

Answer:

He have to invest $527.777778 .

Step-by-step explanation:

X : 4.75% = $10,000 : 90

6 0
2 years ago
Basil asks each of 40 students how many books they bought last year.
Irina18 [472]

Answer/Step-by-step Explanation:

We are given the chart attached below showing no. of books bought by each of the 40 students.

=>Required:

a. % of students who bought 20 or more books (20-24 books)

b. Show that the estimated mean no. of books = 9.5 (i.e. we are to show/calculate the estimated mean for the data given which should be 9.5)

==>SOLUTION:

a. % of students who bought 20 - 24 books = no of students who bought 20-24 books ÷ total number of students multiplied by 100

From the chart, checking the column that represents 20-24, we have 2 students who bought 20 or more books.

Therefore, % of students who bought 20 or more books = \frac{2}{40}*100

= \frac{200}{40}

= 5%

b. To calculate the estimated mean no. of books bought, which should give us 9.5, we would use the formula μ = (∑mf)/N

Where μ = estimated mean

∑ = summation

m = class midpoint

f = frequency

N = population

Estimated mean can be calculated in 3 simple steps as follows:

=>STEP 1: Find mid-point of each class (i.e. m). Thus,

Class 0 - 4 = 2

Class 5 - 9 = 7

Class 10 - 14 = 12

Class 15 - 19 = 17

Class 20 - 24 = 22

STEP 2: Multiply each mid-point by its corresponding class frequency (i.e. mf). Thus,

For Class 0 - 4, we have (2)(11) = 22

For Class 5 - 9, we have (7)(8) = 56

For Class 10 - 14, we have (12)(13) = 156

For Class 15 - 19, we have (17)(6) = 102

For, Cass 20 - 24, we have (22)(2) = 44

STEP 3: Add each value we got from Step 2 and divide by 40 i.e. \frac{∑mf}{N}

Thus,

\frac{22 + 56 + 156 + 102 + 44}{40}

= \frac{380}{40}

= 9.5

Estimated mean (μ) = 9.5

8 0
2 years ago
Please help me with this!
denis-greek [22]

Answer:

im grade 6 sorry I don't know that sorry

Step-by-step explanation:

gongginggingganggonggingginggang

6 0
3 years ago
Read 2 more answers
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