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Ray Of Light [21]
3 years ago
10

Which equations are true?

Mathematics
1 answer:
Vlad [161]3 years ago
7 0

Answer:

Step-by-step explanation:

1)4.5m+4.7=20m+47

4.5m-20m=47-4.7

-15.5m=42.2

m=-2.72

2)14+21w=7(2+3w)

  41+21w=14+21w

   21w-21w=14-41

3)49r+35=7(7r+35)

  49r+35=49r+245

 49r-49r=245-35

4)9(8h-3)=72h-27

  72h-27=72h-27

   72h-72h=-27+27

5)5.2+5.3t=10+15t

   5.3t-15t=10-5.2

    -9.7t=4.8

      t=4.8/-9.7

      t=0.49

6)6f+3.111=18f-33

  6f-18f=-33-3.111

  -12f=-36.111

     f=-36.111/-12

     f=3.01

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Answer:

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Step-by-step explanation:

Simply just means "solve" or "make the equation shorter"

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3 0
3 years ago
What is the las digit of the product of all the numbers between 11 and 29?
Tju [1.3M]

The last digit of the product of all the numbers between 11 and 29 is 0.

A product is something that has undergone one or more multiplications.

Here, we're looking for the final digit of the product of all whole numbers greater than 11 and less than 29.

Next, we have the product as: 12*13*14*15*16*17*18*19*20*21*22*23*24*25*26*27*28

Now take note of the 20 that is present.

Any number multiplied by 20 will result in a zero, so:

Product = 20*(12*13*14*15*16*17*18*19*21*22*23*24*25*26*27*28)

Using only that, we can infer that 0 represents the final digit in the product of all the numbers between 11 and 29.

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4 0
2 years ago
a father is now 38 years older than his son. ten years ago he was twice as old as his son. how old are the father and son now?
insens350 [35]

Answer:

38 + S - 10 = 2S - 20

Collect like terms

38 - 10 + 20 = 2S - S

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Son is 48 years old

Father is 86 years old.

Step-by-step explanation:

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3 years ago
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