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ArbitrLikvidat [17]
4 years ago
7

What is a commutative property of addition mean

Mathematics
2 answers:
Sphinxa [80]4 years ago
8 0
The word "commutative" comes from "commute" or "move around", so the Commutative Property is the one that refers to moving stuff around. For addition, the rule is "a+b=b+a"; in numbers, this means 2+3=3+2. For multiplication, the rule is "ab=ba"; in numbers, this means 2x3=3x2.
vivado [14]4 years ago
6 0
The commutative property of addition means that when you see a problem, you change the order. The co in commutative means change order. That's what my teacher told me.
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A company has 2 machines that produce widgets. An older machine produces 23% defective widgets, while the new machine produces o
svp [43]

Answer:

0.1175 or 11.75%

Step-by-step explanation:

If the new machine is 3 times more productive than the old machine, then 75% of widgets are produced by the new machine with a defective rate of 8%, while 25% of widgets are produced by the old machine with a defective rate of 23%.

The probability that a randomly chosen widget produced by the company is defective is given by:

P = 0.75*0.08+0.25*0.23\\P=0.1175=11.75\%

The probability is 0.1175 or 11.75%.

3 0
3 years ago
A/4 + 2 = 6 &' -4 = r/20 - 5 can u please help me on these two
statuscvo [17]
A/4 + 2 = 6....subtract 2 from both sides
A/4 = 6 - 2
A/4 = 4...multiply both sides by 4, eliminating the 4 on the left side
A = 4 * 4
A = 16

-4 = r/20....multiply both sides by 20, eliminating the 20 on the right side
-4 * 20 = r
-80 = r
8 0
3 years ago
Which is greater 0.7 or 3/4
vovangra [49]
0.7 can be turned into a fraction which can be 70/100 and 3/4 can be turned into 75/100 so 3/4 would be greater
3 0
3 years ago
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Measure of exterior angles in regular 100-gon
Stels [109]
Each exterior angle = (360°  / number of sides)
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7 0
3 years ago
How would I solve this
irinina [24]

Answer:

  • 570 mph
  • 610 mph

Step-by-step explanation:

Let x represent the speed of the slower plane. The faster plane's speed is then x+40. The sum of speeds is ...

   x + (x+40) = 1180

  2x = 1140 . . . . subtract 40

  x = 570 . . . . . .divide by 2

  x+40 = 610 . . . . the speed of the faster plane

The two speeds are 570 mph and 610 mph.

7 0
3 years ago
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