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Nimfa-mama [501]
3 years ago
9

X+7= what commutative property

Mathematics
1 answer:
Ugo [173]3 years ago
8 0
The commutative pooperty of x + 7 is equal to 7 + x.
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Rearranging formula
allochka39001 [22]

Answer:

Arlo's weight = 52.3 kg

Explanation:

Let Arlo be "x"

Then,

Arlo = x

Bert = x+20 (Because Bert is 20 heavier than Arlo)

Cassie = x+20-5 (Because Cassie is 5 lighter than Bert)

Donnie = \frac{x+20}{2} (Because Donnie is half of Bert's weight)

Average = 57

Step by step Calculations:

57 = \frac{(x) + (x+20) + (x+20-5) + (\frac{x+20}{2} )}{4}  (The whole divided by 4 because the total people is 4)

57*4   =  x + x + 20 + x + 20 - 5 + \frac{x+20}{2}

228 = 3x + 35 + \frac{x+20}{2}

228 - 3x - 35 = \frac{x+20}{2}

193 -3x = \frac{x+20}{2}

2(193 - 3x) = x + 20

386 - 6x = x + 20

386 - 20 = x + 6x

366 = 7x

x = \frac{366}{7}

x = 52.3 kg (corrected to 3 significant figures)

Therefore Arlo's weight is 52.3 kg

8 0
2 years ago
I GIVE 70 POINTS !!!!!!!!!!
ivanzaharov [21]

Answer:

395.2

Step-by-step explanation:

104 x 3 .8 = 395.2

Good luck on the test!

7 0
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I ate 4 tacos in 1 day, but I only ate 3 tacos, how many are left?
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1?

Step-by-step explanation:

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The answer is c objects
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