Answer:
population is a total number of men women child leaving on country over prite of time
So if the test is worth 50 points and you got 84% on it you would get 50 times 84/100 points
so 50/1 times 84/100=(50*84)/(50*2)
this is also (50/50) times (84/2)
so you can take out the 50/50 which equals 1 and get 84/2 which divides to equal 42
so you will get 42 points
Answer:
81 books
Step-by-step explanation:
Every 4 months, Eva reads 36 books.
You first need to find the number of books Eva can read in 1 month
By dividing the ratio by you find that Eva can read 9 books per month.
You then add 4 and 5 together to get 9 because Eva has already read for 4 months and is going to read another 5 months after joining the book club.
You use the monthly ratio and multiply it by for the grand total of 81 books for the nine months that Eva has read.
Answer:
The answer is option B
Step-by-step explanation:
To find cos 45° we must first find the adjacent and the hypotenuse
Let the adjacent be x
Let the hypotenuse be h
To find the adjacent we use tan
tan ∅ = opposite / adjacent
From the question
the opposite is 9
So we have
tan 45 = 9 / x
x tan 45 = 9
but tan 45 = 1
x = 9
Since we have the adjacent we use Pythagoras theorem to find the hypotenuse
That's
h² = 9² + 9²
h² = 81 + 81
h² = 162
h = √162
h = 9√2
Now use the formula for cosine
cos∅ = adjacent / hypotenuse
The adjacent is 9
The hypotenuse is 9√2
So we have
cos 45 = 9/9√2
We have the final answer as
<h3 /><h3>cos 45 = 1 / √2</h3>
Hope this helps you
First you'll need two equations ( you can use any variables you want)
A= photo group 1
B= photo group 2
First equation:
A + B = 33
This is because the total number of photos from both groups is 33
Second equation:
4A = 7B
This is because the ratio is 4:7 so for every four photos in group A there must be 7 photons in group B.
Then take the first equation A + B = 33 and subtract B from both sides. Making the equation A = 33 - B
Then with that equation, substitute it in for equation 2 and it will look like this. 4(33-B) = 7B
Then distribute the 4 to the 33 and the -B making the equation 132 - 4B = 7B
Then add 4B to each side
Making the equation 132 = 11B
Then to get B by itself you must divide each side by 11 making the equation 132/11 = B which simplifies to 12 = B
Then plug in 12 for B in the first equation like this A + 12 = 33
Then subtract 12 on each side of the equation to isolate A so A = 21
So
A = 21
B = 12