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dlinn [17]
3 years ago
5

One crew can seal a parking lot in 12 hours and another in 15 hours. how long will it take to seal the parking lot if the two cr

ews work together?
Mathematics
1 answer:
MakcuM [25]3 years ago
6 0
This is a typical work problem in algebra. The approach to this is using the equation: Rt = 1, where R is the rate per person working, t is the amount of time worked by an individual. All their rates must equal to 1. The solution is as follows:

12/x + 15/x = 1
Solving for x,
x = 27 hours

So, if they work together, they can finish the work in 27 hours.
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A function that models the profit for a new pet-monitoring system shows that there is no profit made until the price reaches $95
-Dominant- [34]

The profits at x = $185 is 0 and the graph is attached below:

<h3>What is graph?</h3>

Graph is a mathematical representation of a network and it describes the relationship between lines and points.

Function is to model the profits of a new pet-monitoring system, so, if the profits are y and x then y = f(x)

The curve shows that y is negative at values of x< $95, then the profits increase when x varies between $95 and $140.

The profits reach a maximum at $140 and then the profits start to reduce as x increases again.

So, the profits at x = $185 is 0.

Learn more about this concept here:

brainly.com/question/16887458

#SPJ1

6 0
2 years ago
Is 21/50 in simplest form?
Serhud [2]
Yes 21/50 is in simplest form
3 0
3 years ago
5a+c=-8a, <br> solve for a
VMariaS [17]

Answer:

a=-1/13c

Step-by-step explanation:

5a+8a=-c

13a=-c

a=-1/13c

6 0
2 years ago
Read 2 more answers
What is the value of a in the polynomial
Alexandra [31]

Answer: a= 16

Step-by-step explanation:

We have the following expression:

(y-4)(y^2 +4y +16)

To find the value of the coefficient "a" you must use the distributive property to multiply the expression:

(y-4)(y^2 +4y +16)

until you transform it to the form:

y^3 +4y^2 +ay -4y^2 -ay-64

Then we have

(y-4)(y^2 +4y +16)\\\\(y^3 +4y^2 +16y -4y^2 -16y-64)\\\\

Therefore the value of a in the polynomial is 16

5 0
3 years ago
How to write 76. 100 in word form
joja [24]
Seventy-six and one tenth
5 0
3 years ago
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