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Alja [10]
3 years ago
13

Four students each made a list a of prime numbers.

Mathematics
2 answers:
Nataly_w [17]3 years ago
7 0
Jordan did because 21 is not a prime number.
Anuta_ua [19.1K]3 years ago
4 0
Jordan made the error because 21 is a composite number
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Which expression illustrates the associative property of addition?
4vir4ik [10]

Answer: THIRD OPTION.

Step-by-step explanation:

The Associative property of addition states that when three or more numbers are added, it does not matter how they are grouped, the sum is the same. Then:

a + (b + c) = (a + b) + c

Based on this and having the expression 3 + 19- 12, we can apply the Associative property as following:

(3 + 19) - 12 = 3 + (19 - 12)

Therefore, the  expression that illustrates the Associative property of addition is the one shown in the Third option.

3 0
2 years ago
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If i weigh 210 and i need to loose 5 pounds a month in 6 months what is my end weight
maw [93]
That would be 180 cuz you lose a total of 5 pounds per 6 months so30 pounds. Then 210 minus 30 is 180
8 0
3 years ago
4) If the perimeter of a square is 48cm",
Mila [183]

Answer:

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Let me know if this helps!

3 0
3 years ago
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ruslelena [56]
I'm not sure how to answer the question... BUT, I know that the side that says 2 is for the blue marbles and 1 is for the red marbles, meaning that every 2 blue marbles she has equal 1 red marble. 
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5 0
3 years ago
Solve the equation for x 1/3x - 15 = 12
Akimi4 [234]
X = 81
You are welcome
6 0
3 years ago
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