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agasfer [191]
4 years ago
15

I really need helpthx

Mathematics
1 answer:
scZoUnD [109]4 years ago
8 0
5) 2*5
     over             which equals 10/40 or 1/4
    5*8

6)8*3=24 
   15*10=150  answer is 24/150

7)2*12=24
  9*13=117   answer 8/39 

8)7*12=84
   8*1=8  answer 8 and 1/2 or 84/8

9)4*5=20
   12*1=12 answer 1and 2/3 or 20/12 

10) 4*4=16
      9*9=81   answer 16/81

11)3*7=21
    14*9=126 answer 1/6

12)8*24=192
     9*11=99 answer 1 and 31/33 or 192/99


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1/2a - 4 = 6 try and answer this question
patriot [66]

Answer:

a = 20

Step-by-step explanation:

1/2a - 4 = 6

      +4    +4

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

1/2a = 10

*2        *2

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

1a = 20

/1      /1

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

a = 20<em> -------------------> answer</em>

5 0
2 years ago
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A chemistry teacher needs to mix a 20% salt solution with a 80% salt solution to make 25 qt of a 44% salt solution. How many qua
NNADVOKAT [17]
Let there be x quarts of the 20% salt solution, and (25 - x) quarts of the 80% salt solution.
Then the total amount of salt in the 20% portion would be 0.2x, while that from the 80% portion would be (0.8)(25 - x). This would have to total up to (0.44)(25) in the final solution, so the equation is:
0.2x + 0.8(25 - x) = (0.44)(25)
-0.6x + 20 = 11
x = 15 quarts of the 20% salt solution
25 - x = 10 quarts of the 80% salt solution
5 0
3 years ago
How many meters are in a yard
Kruka [31]
1 yard = 0.9144 meter
3 0
4 years ago
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A silver chain has 100 links. Each link is made of thin silver wire and is in the shape of a circle of radius 2,5 cm. Find the v
Tamiku [17]

Number of links = 100

Shape of each link = Circle

Radius = 2.5

Area = πr²

= 3.14×2.5×2.5

= 19.625

Now for 100 links

19.625×100

1962.5Cm²

Cost = 1962.5 × 0.06

= $117.75

Must click thanks and mark brainliest

4 0
3 years ago
7. 2x3 – 16x² – 40x=0
kondor19780726 [428]

Answer:

x=0

Step-by-step explanation:

x^2-8x-2=0

x=±3√2−4

6 0
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