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mojhsa [17]
3 years ago
12

Dan can tile a floor in 3 hours. his assistant could tile the same floor in 8 hours. if they work together, how long will it tak

e to tile the floor?
Mathematics
1 answer:
natta225 [31]3 years ago
7 0

There is a formula for this:

Total Time = (worker1 * worker2) / (worker1 + worker2)

(3 * 8) / (3 + 8)

24 / 11 =

2.1818181818 hours


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A certain kind of animal weighs about 75 pounds at birth and gains about 2 pounds per day for the first few weeks. Determine tho
Elodia [21]
<h3>Answer:</h3>

25

<h3>Step-by-step explanation:</h3>

Let w represent the weight of the animal in pounds, and d the age in days. The problem statement tells us ...

... w = 75 +2d

We want to find d when w > 125.

... 75 +2d > 125 . . . . . substitute the above expression for w

... 2d > 50 . . . . . . . . . subtract 75

... d > 25 . . . . . . . . . . . divide by 2

The animal will weigh more than 125 pounds when it is more than 25 days old.

4 0
3 years ago
What exclusions are placed on the variable x for the fraction 4x^2-1/4x+2
aalyn [17]
Below are the choices:

<span>-1/2
0
 -1
 non
</span>
The  exclusions are placed on the variable x for the fraction 4x^2-1/4x+2 is -1/2. Below is the solution, 

<span>4x+2 = 0 so 4x=-2 so x=-2/4 wich is -1/2</span>
7 0
3 years ago
Read 2 more answers
Can someone plz explain to me when to use an open and closed dot
balandron [24]

closed dot is if the number is part of the solution so if it is equal to

 and

use open if it is not part of solution as in if it is greater than or less than

 so for your picture x greater or equal to -2 it would be a closed dot

5 0
3 years ago
What is (9^4)^2?<br> And what is (6^1)^0?
Alexandra [31]

Answer:

hhhhgvguhvibjhvgyvv

Step-by-step explanation:

bhufyhg88

8 0
3 years ago
Help with this one to
aliina [53]

Answer:

D

Step-by-step explanation:

even

4(-x^3) = 4x^3

-4x^3 = 4x^3 (false)


odd

-4x^3 = 4(-x^3)

-4x^3 = -4x^3

3 0
1 year ago
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