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Amanda [17]
3 years ago
8

Complete the table below to solve the equation 2.5x − 10.5 = 64(0.5x).

Mathematics
1 answer:
natima [27]3 years ago
8 0
The table answers for the first equation are
-5.5
-3
-.5
2
3.5
The table answers for the second equation are
16
8
4
0
-4
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masha68 [24]

Answer:

38 km

Step-by-step explanation:

1. The formula to find the area of a trapezoid is \frac{a+b}{2}h, where a and b are the bases and h is the height.

2. To find the area, all we have to do is plug in these values and simplify!

3. (Solving)

  • \frac{a+b}{2}h
  • \frac{4.3+10.9}{2}*5
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Therefore, the area is 38 km.

6 0
2 years ago
What is 0.75% of 387
luda_lava [24]

Answer: 2.9025


Step-by-step explanation:

0.75 x 387/100  

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3 0
3 years ago
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Dave is three times as old as his sister. In seven years the sum of their ages will be 38. How old are they now?
bija089 [108]

Answer:

Dave is 18 and his sister is 6.

Step-by-step explanation:

If you do 38 -7x2 you can work out the combined ages of them now which is 24 (you have to do 7x2 because there are two of them and its seven years in the future). Then you can work out their ages using a ratio. Dave’s age : his sister’s age is 3:1 so if you divide 24 by 4 (3+1 = 4 so your can work out one portion of their age) you can find out how old the sister is which is 6. Times that by 3 to get Dave’s age which is 18. A formula for this (where x is his sisters age) would be 3x=38-7x2 which cancels down to 6.

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3 years ago
19) Write the scientific notation of 1
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Answer:

1.0 x 10^0

Step-by-step explanation:

The above works because 10^0 = 1, and 1 x 1 = 1.

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Yes the problem is true and 56 is a solution
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3 years ago
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