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nadezda [96]
3 years ago
12

Application of linear equation in two variable in real life

Mathematics
1 answer:
Ivan3 years ago
6 0
We can compare the two units or object performances by that.... even in the case of magnitude lower than zero....
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if A and B together can do a piece of work in 10 days and B along can do it in 15 days, how many part of the work does A complet
anzhelika [568]

Answer:

1/5

Step-by-step explanation:

Well work can be defined as: work = rate \ *\ time

where rate=amount of work that can be done in one unit of time

let a = rate of work A does in a day

let b = rate of work B does in a day

this means that: 10a + 10b=1 where work=1 and it just means the entire job has been completed.

Since b can do it alone in 15 days, this means that: 15b=1

If we divide by 15 here, we get the equation: b=\frac{1}{15}

We can now use this definition to substitute it into the first equation we made.

10a + 10(\frac{1}{15}) = 1

Multiply the 10 and 1/15

10a+\frac{2}{3}=1

subtract 2/3 from both sides

10a=\frac{1}{3}

Now divide both sides by 10

a=\frac{1}{30}

Now multiply this by 6, since we a represents the amount of work that can be done in a day, we want to find how many parts of the work can be done by a in 6 days

6a=\frac{6}{30}

Now divide both the numerator and denominator by 6

a=\frac{1}{5}

8 0
2 years ago
Madison made the following table to record the height of each person in her family. If Madison and Jade lay end to end, how far
vitfil [10]

Answer:

10 ft

Step-by-step explanation:

To get their total reach, we add the two numbers.

 5⅙

+4⅚

Add integers and fractions

 5⅙

<u>+4⅚ </u>

 9⁶/₆

Convert the fraction to an integer

⁶/₆ = 1

Add the 1 to the 9

9 + 1 = 10 ft

If Madison and Jade lay end to end, they will they reach 10 ft.

6 0
3 years ago
The angles of two pentagons are all equal to 108°. The length of one side of each pentagon measures 11 cm.
max2010maxim [7]
There is not enough information to determine whether the pentagons are congruent.

3 0
3 years ago
The sum of the roots of the equation x 2 + x = 2 is:
julsineya [31]
Hello : 
x²+x - 2 =0
a=1   b=1   c = -2
<span>The sum of the roots is : S = -b/a 
</span>S = - 1/1 = -1 
4 0
3 years ago
Read 2 more answers
Find the value of the combination.<br><br> 21 C 3<br><br> 7,980<br> 2,660<br> 1,330
erik [133]
To evaluate the combination we proceed as follows:
21C3
Given nCk we shall have:
n!/[(n-k)!k!]
thus plugging the values in the expression we get:
21!/[(21-3)!3!]
=21!/(18!×3!)
=1330
Answer: 1330
4 0
3 years ago
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