In math class the girl to boy ratio is 3to 6 if there are 15 girls how many boys are there?
Answers
3 / 6 = 15 / x
so 15 * 6 = 90
divide by 3 and get 30 boys
Related Questions
23x34=(20+3)x(30+4) what property does this demonstrate
Bryson buys a bag of 64 plastic miniature dinosaurs . could he distribute them equally into six storage containers and not have any left over?explain .
The number of people who attended an art conference for five days was 42,27,35,39, and 96 . Describe the effect of the outlier on the mean and median
What is 99.09 divided by 3
Answers
3 30
___=_____
15 x
cross multiply
3x=450
divide both sides by 3
x=$150
Answers
Answers
I did a manual computation per company: My computation is entirely based on trial and error.
Red Bus Co. has a fixed rental rate of 150 and additional rental of 72 per hour while Blue Bus Co. has a fixed rental rate of 240 and additional rental of 54 per hour. Both fixed rental rate are one time charges only and total rental will vary on the number of hours spent in using both vehicles.
Let's start with the Red Bus Co. I will be posting the charges per hour and its running balance. The running balance is the sum.
Fixed Rate 150 Running Balance: 150 => 150 + 0
Hr 1 72 222 => 150 + 72
Hr 2 72 294 => 222 + 72
Hr 3 72 366 => 294 + 72
Hr 4 72 438 => 366 + 72
Hr 5 72 510 => 438 + 72
I'll do the same process with Blue Bus Co.
Fixed Rate 240 Running Balanc: 240 => 240 + 0
Hr 1 54 294 => 240 + 54
Hr 2 54 348 => 294 + 54
Hr 3 54 402 => 348 + 54
Hr 4 54 456 => 402 + 54
Hr 5 54 510 => 456 + 54
1 week = 7 days
1 hour = 60 minutes
Part A
Write and solve an equation to find how
many hours Delia brushes her teeth in
1 week.
Part B
to find how
many minutes Delia brushes her teeth in
1 week.
Answers
Answer:
part A. 7
Part B. 420
Answers
2x + y = -14
y = -14 - 2x
Now we have a y value and we can substitute it back into the other equation. So we will replace y in the second equation with (-14 - 2x).
That will leave us with just the x as a variable and we can solve for x.
7x - 4y = -19
7x - 4(-14 - 2x) = -19 multiply the -4 through the parentheses
7x + 56 + 8x = -19 combine like terms
15x + 56 = -19 subtract 56 from each side
15x = -75 divide each side by 15
x = -5
Now we have a value for x that we can substitute back into either of the original equations and then solve for y. I usually go with the easier equation, but it doesn't matter. Let's use the first one...
2x + y = -14
2(-5) + y = -14 multiply the 2 through the parentheses
-10 + y = -14 add 10 to each side
y = -4
So your ordered pair is
(-5, -4)
That is where the 2 lines are equal to one another, so that's the point where they they intersect.
Note*** You can start these problems with either equation and solving for either x or y... it doesn't matter. After you substitute the values into the other equation it will work out the same.
Answers
Volume: Base x height:
volume= pie times radius squared times height