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PIT_PIT [208]
3 years ago
15

Simplifying the following expression: 6x + 2(3x + 5) + (-9)

Mathematics
2 answers:
kodGreya [7K]3 years ago
6 0
You need to use the distributive property and distribute 2.
multiply 2 by 3x then 2 by 5
youll now get 6x+6x+10- 9
simplify that again and you'll be done
Nezavi [6.7K]3 years ago
3 0
= <span>6x + 2(3x + 5) + (-9)
= 6x +6x + 10 - 9
= 12x + 1

In short, Your Final Answer would be 12x + 1

Hope this helps!</span>
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Dahasolnce [82]
The formula for the confidence interval is given by

Sample mean + z*[σ/√n], and
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We have:
Sample mean = 23.95
n = 40 
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z* for 99% confidence = 2.58

Substitute these values into the formula, we have

23.95 + (2.58)(2.55÷√40) = 24.99
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5 0
3 years ago
Four different digits from 1 to 9 are required to open a safe.
masha68 [24]

Answer:  5942

<u>Step-by-step explanation:</u>

Clue 4 states exactly two of the digits = 1, 4, or 9

Clue 1 leaves us with the following combinations:

1, 9, 2, 8

1, 9, 3, 7    eliminate by clue 5

4, 9, 2, 5

1, 4, 7, 8

Clue 5 directs us to the following order for 1,9,2,8

2 __ __ 1     --> 2981 or 2891   eliminate by clue 2

9 __ __ 8    --> 9128 or 9218   eliminate by clue 6

9 __ __ 2    --> 9182 or 9812   eliminate by clue 6

Clue 5 directs us to the following order for 4,9,2,5

5 __ __ 2     --> 5492 or 5942   eliminate 5492 by clue 2

9 __ __ 2    --> 9452 or 9542   eliminate by clue 3

Clue 5 directs us to the following order for 1,4,7,8

4 __ __ 1    --> 4781 or 4871    eliminate by clue 2

The only combination not eliminated is 5-9-4-2, which satisfies all six clues.

1) 5 + 9 + 4 + 2 = 20

2) 5 > 4

3) 9 - 2 > 5

4) 4 & 9 but not 1 are included

5) 5 + 2 = 7, which is a prime number

6) 2 <  5, 9, 4

5 0
3 years ago
A 6-foot piece of ribbon costs $15.84. What is the price per inch?
sleet_krkn [62]

Answer:

$0.22/inch

Step-by-step explanation:

6 ft = 72 inches

15.84/72 =0.22

6 0
3 years ago
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Please mark me brainiest i think the answer is 2.600
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3 years ago
john has earnes a 77, 76 and a 84 on his first three projects of the semester.if he hopes to have a b average (80 or above) what
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He need to have at least an 83
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