one person can paint a room in 5 hours and the other takes 8 hours working together how long will it take the two of them if they're working together please work the problem out and explain it to me
Answers
irst person is 5 hours to do all room
therefor
1 hour=1/5 room
2nd person takes 8 hours to do all room
therefor
1 hour=1/8 room
since working together, add times
1 hour=1/5+1/8
make denoms same
1hour=8/40+5/40=13/40
13/40 room times x hours=1 whole room
multiply both sides by 40/13 to cleaf raction (13/40 times 40/13=520/520=1)
xhours=40/13hours
xhours=3 and 1/13 hours
Related Questions
23. Jackie returned to the store later that day and bought n more notebooks at the same price. This time she used a store coupon for $3.50 off her entire purchase. The total she spent was more than $18. Write an inequality to represent this situation.Inequality What was the least number of notebooks that Jackie could have bought this time? Answer notebooks
Which point is a solution to the equation 2x − y = 4? a. (0, 4) b. (1, 2) c. (−3, −10) d. (−3, 10)
three bags of potatoes and four cases of corn cost $40. Five bags of potatoes and two cases of corn cost $34. Find the cost of one bag of potatoes and the cost of one case of corn.
Farmers have learned how to grow watermelonsin the shape shown at the right. Whatthree-dimensional figure is the watermelon?
Answers
Answer:
16 or 1. There are 2 different answers depending on how you take the question as.
Step-by-step explanation:
8÷2(2+2)=
8÷2(4)=
4(4)=
16
OR
8÷2(2+2)=
8÷2(4)=
8÷8=
1
Answers
Answer:
∠RWT
Step-by-step explanation:
The angels in matching corners are corresponding angles
Find the common ratio for the following sequence. 1/2, -1/4, 1/8, -1/16, ...
Find the common ratio for the following sequence. 1/2, -1/4, 1/8, -1/16, ...
Answers
Find the common ratio for the following sequence. 1/2, -1/4, 1/8, -1/16, ... = -1/2
Find the common ratio for the following sequence. 1/2, -1/4, 1/8, -1/16, ... = -1/2
Answer:
1/3
Step-by-step explanation:
Answers
Answer:
Dial it up : ring ring
=8:9
Step-by-step explanation:
From Dial it up= $16 per 2 gb.
ratio of gb : price
2:16
can be reduced to 1:8
this means that per each Gigabyte, you pay $8.
Ring Ring has plans of $9 per 1gb
ratio of gb to price is 1:9
And the ratio between the prices
of the companies is
Dial it up:ring ring
8:9
which means that in one company you get one gb for $8, while in the other company you get the same one gb for $9.
Answer:The initial value represents the 2 gigabytes of data stored on the computer when Jackie bought it, and the rate of change represents the 3.5 gigabytes per year that Jackie is storing.
122√
63√
6
A right triangle with both legs shown with one tick mark. One of the legs is labeled 12. The hypotenuse is labeled x.
Answers
Here we use the Pythagoras theorem
According to this, in a right angled triangle, the sum of the squares of the lengths of the two sides is equal to the hypotenuse
is "a" and "b" are the sides, and "h" is the hypotenuse, then :
In the given problem, a = b = 12 and h = x
12^2 + 12^2 = x^2
So, x =
x =
X =
X = 12 (Option B)
Answers
so we find the factors and include all of them so like this
15=3 times 5
12=2 times 2 times 3
8=2 times 2 times 2
so to include all of them we include 3 2's, 1 3 and 1 5 or 2 times 2 times 2 times 3 times 5 or 8 times 15 or 4 times 30 or 120
the LCM is 120
so 4/15=32/120
1/12=10/120
3/8=45/120
add 32/120+10/120+45/120=(32+10+45)/120=87/120
To find the LCM, multiply two of the numbers together and test to see if the third one divides evenly into it.
15 x 8 = 120
120 ÷ 12 = 10
Because all three numbers go evenly into 120 (and 120 is the smallest number for which that is true), the least common denominator would be 120.