Two large and 1 small pump can fill a swimming pool in 4 hours. One large and 3 small pumps can also fill the same swimming pool in 4 hours. How many hours will it take 4 large and 4 small pumps to fill the swimming pool? Please help me answer I'm in 5th grade and this is so hard.
Answer:
Let's define.
L = rate at which the large pump fills the pool.
S = rate at which the small pump can fill the pool.
We have two relations:
"Two large and 1 small pump can fill a swimming pool in 4 hours."
(2*L + S)*4h = 1
"One large and 3 small pumps can also fill the same swimming pool in 4 hours."
(L + 3*S)4h = 1
Then we have the system of equations:
(2*L + S)*4h = 1
(L + 3*S)4h = 1
To solve this system, we need to isolate one of the variables in one of the equations, i will isolate S in the first equation:
S = 1/4h - 2*L
Now we can replace that in the second equation:
(L + 3*(1/4h - 2*L))4h = 1
L + (3/4h) - 6*L = 1/4h
-5*L = 1/4h - 3/4h = -2/4h
L = (2/4h)*(1/5) = (2/20h) = 1/10h
This means that one large pump needs 10 hours to fill one pool.
With this, we can find the value of S:
S = 1/4h - 2*L = 1/4h - 2/10h = 5/20h - 4/20h = 1/20h
This means that a small pump needs 20 hours to fill a pool.
Now we can answer:
How many hours will it take 4 large and 4 small pumps to fill the swimming pool?
We need to solve the equation:
(4*(1/10h) + 4*(1/20h))*T = 1
We need to find the value of T.
T = 1/((4*(1/10h) + 4*(1/20h)) = 1.67 hours.
This means that 4 large and 4 small pumps need 1.67 hours to fill a pool.
Can someone help me with sub multiple angles trigonometry pls
Answer:
These photos have the formulas of sub multiple angle trigonometry.
Hope it helps:)
What are the slope and the y-intercept of the linear function that is represented by the table?
x
y
–3
18
0
12
3
6
6
0
The slope is –2, and the y-intercept is 6.
The slope is –2, and the y-intercept is 12.
The slope is 2, and the y-intercept is 6.
The slope is 2, and the y-intercept is 12.
Answer:
B. The slope is -2, and the y-intercept is 12
Step-by-step explanation:
did it on edge 2020
which expression has the same value as -3 + (-5)
A: -3 - (-5)
B: - 3 + 5
C: -5 + (-3)
D: -5 - (-3)
Answer:
its b
Step-by-step explanation:
if negative 5 is an absolute value it becomes just a regular 5. Therefore it would be equivalent to -3+5. (sorry if I'm wrong)
u need to find out 3/4 divided by what = 3/24
best rapper????????????
Answer:
easy uzi tay k or sofaygo
Step-by-step explanation:
14.Y = Mx + b. Identify the slope and the y intercept.
-help meh
Answer:
y=mx+b is slope intercept form
In slope intercept form, m represents the slope, b represents the y-intercept and x and y represent the values of x and y on a graph.
Therefore, the slope is m and the y-intercept is b
Step-by-step explanation:
tony spent $60 on video games , each video game cost $6 . how many video games did tony buy
Answer:
10
Step-by-step explanation:
What is the value of x
a 10
b -12
c -10
d-9
Can some one help me.
The critical points of a rational inequality are -1, 3, and 4. Which set of points can be tested to find a complete
solution to the inequality?
x= 1 and x = 3.5
x= -1, x= 3, and x = 4
O x = -2, x = 2, and x = 5
O x= -3, x= 1, x= 3.5, and x = 5
Nexty
Save and Exit
Submit
Mark this and return
Answer:
It's D I got it right
Step-by-step explanation:
I know
Answer:
D
Step-by-step explanation:
x = –3, x = 1, x = 3.5, and x = 5
a plumber charges a flat fee of $79 to visit a home and examine a clogged drain the plumber charges an additional $24 per hour spent fixing the drain. the total cost C in dollars for fixing to dream that takes H hours is given by the following :
C=24h + 79
question 1 ? what is the total cost for fixing a drain that takes 5 hours ?
question 2? if the plumber charged a total of $343 how many hours did he spend fixing to drain ?
What is the answer to this question
23% of what number is 36? please help
O 36 = (0.23)x
O x = (0.23)(36)
O 36 = 23x
O x = (23)(36)
can someone help! with this please.
I’ll mark you brainlist I’ll mark you brainlist I’ll mark you brainlist
Answer:
139°
Step-by-step explanation:
According to the question
The equation is
4r+17+4r+115=180
8r+132=180
8r=48
r=6
So BYF =
4.6+115
24+115
139°
Answer:
139
Step-by-step explanation:
Select all ratios equivalent to 3:5.
6 : 10 10 : 25 25 : 15
There were some people on a train.
18 people get off the train at the first stop and 21 people get on the train.
Now there are 65 people on the train.
How many people were on the train to begin with?
Answer:
62
Step-by-step explanation:
let there be X people in the beginning
so
X-18+21=65
X+3=65
X=65-3
X=62
Helpppp I’ll give you a star
Answer:
b
Step-by-step explanation:
b
HELPP PLEASEE!!
three times the sum of a number and 9 is 8
use the variable W for the unknown number
h*es on me left and..
Answer:
gl*ck 9 put em out like a light
Step-by-step explanation:
Coupe tinted like a thief in the night
Can someone help me ?? I’ll give brainliest!
SOMEBODY PLS HELP ILL MARK U BRAINLIEST
Answer:
- 16x + 3y
Step-by-step explanation:
this can be done in two ways- vertical method or horizontal :
I did one:
( i hope this is right)
Diego made 6 boxes of spaghetti to feed the 20 people who attended his dinner party.
Next time, 50 people are coming! How many boxes of spaghetti should Diego buy to feed all those people?
Diego needs to buy ? boxes of spaghetti.
Answer:
15 boxes!
Step-by-step explanation:
Hope this helps!
The number of boxes of spaghetti required to feed 50 people will be equal to 15 boxes.
What is the ratio?The ratio notion is used in mathematics when evaluating two or more numbers. It works as a comparison tool to demonstrate how big or small a particular number is.
A ratio divides two quantities to compare them.
As per the given information in the question,
Total number of people who attended the party first time = 20
Number of spaghetti boxes required to feed 20 people = 6
Let the number of boxes required to feed 50 people be x.
So, the ratio will be,
6 boxes = 20 people
x boxes = 50 people
Perform cross-multiplication,
20x = 50 × 6
x = (50 × 6)/20
x = 5 × 3
x = 15 boxes.
To know more about Ratios:
https://brainly.com/question/13419413
#SPJ6
what is 60 divided by 95 (or is it the other way around?)
Answer:
it would be 95 divided by 60
Step-by-step explanation:
but the answer to that is 1.5833333333333333333
i just wanted to make sure my answers are correct could someone tell me if they are or not correct or tell me which ones are wrong?
14. Is B
16. Is B
correct
i'm stuck, plsss help ASAPP!!! :))
Answer:
15 units
Step-by-step explanation:
[tex]d \: = \sqrt{(x2 - x1) ^{2} + (y2 - y1) ^{2} } [/tex]
d = 14.866
d = 15
what is the percent decrease from 9,000 to 0
Answer:
-100%
Step-by-step explanation:
Answer:
-100
Step-by-step explanation:
I got u bro
What have you liked and disliked about being virtual this school year? Do you plan to be virtual next semester? can someone whrite summary i lost my dog we are trying to find n i need to dis homework i can not come up with something i am really sad i will you brainlsist thank you
To be honest I have not liked anything about being online at school, I hope to return soon (but I am a little scared because I am new to school and I have no friends: c) If the next semester they open I plan to go to schools, but if they don't open, then I'll stay online. I hope they find your pet soon! I don't know you but I love you very much!
Answer:
I don't like not being able to see my friends and miss seeing my teachers and don't do as well. I also struggle when i cant be face to face with a teacher so I can get help. I liked not having to wear a mask and chill at home in my pajamas. I also do not plan to be virtual next semester.
Step-by-step explanation:
Pls give me brainliest
Your parents take your family out to dinner on a Wednesday night when they have a 15% off coupon. Your parents wanted to give the waiter a 18% tip for doing a great job. If the total amount of the dinner was $42.00, how much tip money should the waiter get? What is the new total? **Tip is given before the discount**
Answer:
a. Tip is before the discount so the waiter will get;
= 42 * 18%
= $7.56
b. New total;
Coupon of 15% off applies;
= 42 * (1 - 15%)
= $35.70
Add the tip;
= 35.70 + 7.56
= $43.26