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mafiozo [28]
3 years ago
12

Half of sarans wire is equal to 2/5 of daniel's. chris has 3 times as much as sarah. in all, their wire is 6 feet. how long is s

arah's wire in feet?
Mathematics
1 answer:
Pepsi [2]3 years ago
7 0
You need to make a series of equations from what you are given first. I am going to use the first letter of each of the names to represent the length of that persons wire.
1/2s=2/5d
3c=s
s+d+c=6 ft

Okay. Now you can combine the first two equations knowing what s equals:
1/2(3c)=2/5d
d=15c/4

Now you have d=15c/4 and s=3c, so you can replace d and s in the third equation.

3c+15c/4+c=6

Then solve for c and plug it into the equation 3c=s to find the length of sarah's wire.
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bearhunter [10]

Answer:

127.3

Step-by-step explanation:

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T≈127.333≈127.3

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6 0
3 years ago
The sum of twice a number and another number is 24. The difference of twice the first number and the other number is 12. Which s
dem82 [27]

Answer:

The system that models the situation is:

\left \{{{2x + y = 24} \atop {2x - y = 12}} \right.

The solution is:

(9, 6)

Step-by-step explanation:

We must write the equations as indicated in the problem.

The sum of twice a number and another number is 24

<em>a number:</em>  x

<em>other number:</em>  y

Then

2x + y = 24

The difference of twice the first number and the other number is 12

<em>first number: </em> x

<em>other number:</em>  y

Then:

2x - y = 12

The system that models the situation is:

\left \{{{2x + y = 24} \atop {2x - y = 12}} \right.

To solve the system we add both equations to find the value of x

2x + y = 24\\\\2x - y = 12

---------------------

4x +0 = 36\\\\x=\frac{36}{4}\\\\x=9

2(9) +y = 24\\\\y=24-18\\\\y=6

The solution is:

(9, 6)

6 0
3 years ago
What is the property of (9×5)d
andrey2020 [161]
Associative property of multiplication
(note, ab means a times b)

a(bc)=(ab)c


allows us to move parenthasees around when all multiplying
6 0
3 years ago
3x - 9 + 4x<br> Please Help
Wewaii [24]

Answer:

Add like terms 7x - 9

Step-by-step explanation:

7 0
3 years ago
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Dafna11 [192]

9514 1404 393

Answer:

  59 3/4

Step-by-step explanation:

The change from the opening price is ...

  -50 1/2 +110 1/4 = 60 -1/4 = 59 3/4 . . . change from opening price

3 0
3 years ago
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