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hodyreva [135]
4 years ago
7

Solve 2a + 21 = 8a - 9, step by step

Mathematics
1 answer:
Rom4ik [11]4 years ago
6 0
2a + 21 = 8a - 9

Combine like terms. 

2a + 21 = 8a - 9
-2a          -2a

21 = 6a - 9 
+9          +9

30 = 6a
6a/6 = 30/6
a = 5

Answer: a = 5
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When you multiply two prime numbers together the answer is always an odd number?
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No, because 2 is a prime number and 2 times anything equals a even number.
so the answer to your question is NO.
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3 years ago
Find the sum of 3b/b 2 and 12/b 2 and express it in simplest form
alexandr1967 [171]
\frac{3b}{b^{2}} + \frac{12}{b^{2}} = \frac{3b + 12}{b^{2}} = \frac{3(b) + 3(4)}{b^{2}} = \frac{3(b + 4)}{b^{2}}
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3 years ago
What is the solution to the equation1 over the square root of 8 = 4(m − 2)? (1 point)
kupik [55]
Rationalize the denominator, divide by 4, add 2.
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3 years ago
in a standard deck of t2 playing cards, there are 4 aces, 4 kings, 4 queens, and 4 Jacks. All other cards have number values. th
Illusion [34]

Answer:

0.01

Step-by-step explanation:

Assuming the deck is the national playing deck with 52 cards.

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4/52 * 4/52 = 0.0059

3 0
3 years ago
Which list of ordered pairs represents solutions to x + y = 2? (-4, 6), (0, 2), (4, 2); (-4, -6), (0, 2), (4, 2); (-4, 6), (0, 2
baherus [9]

Answer:

(-4, 6), (0, 2), (4, -2)

Step-by-step explanation:

x + y = 2?

(-4, 6),   -4+6 = 2    True  this is a solution

(0, 2),    0+2  = 2    True  this is a solution

(4, 2);    4+2 = 6    False  this is not a solution

This is not a solution set since we have a pair that is not a solution

(-4, -6),   -4+-6 = 10  False  this is not a solution.  We do not have to check the rest since this cannot be a solution set

(0, 2),

(4, 2);

This is not a solution set since we have a pair that is not a solution

(-4, 6),  -4 + 6 = 2  True  this is a solution

(0, 2), 0 + 2 =2   True  this is a solution

(4, -2)  4-2 =2   True  this is a solution

This is a solution set since all the points are a solution

4 0
4 years ago
Read 2 more answers
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