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Harrizon [31]
3 years ago
14

The sum of 2 times a number and 8 is 7

Mathematics
2 answers:
My name is Ann [436]3 years ago
8 0

Answer:

The number is -1/2

Step-by-step explanation:

Let x be the number

2x+8 = 7

Subtract 8 from each side

2x+8-8 = 7-8

2x = -1

Divide each side by 2

2x/2 =-1/2

x = -1/2

The number is -1/2

3241004551 [841]3 years ago
3 0

Answer:

2x + 8 = 7

x = -1/2

Step-by-step explanation:

"a number" can be signified by a variable.

So 2 times a number would give you 2x

And 8 would mean to add 8.

Is 7 means the end result is 7.

So 2x + 8 = 7

x = -1/2

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A single die is rolled. How many ways can you roll a number that is prime, followed by a 6?
Grace [21]

Answer:

3 ways

Step-by-step explanation:

Since 6 will remain constant throughout the testing, we just need to find all prime numbers 1-6.

1 - is not prime nor composite

2 - is prime

3 - is prime

4 - 2x2=4, so composite

5 - is prime

6 - 2x3=6, so composite

Therefore, 2, 3, and 5 are prime numbers, and there are 3 of them.

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Jaz was 43 inches tall. Eighteen months later she was 52 inches tall. Find the constant rate of change of jaz's height
notka56 [123]

Answer:

.5 inches a month


Step-by-step explanation:

52 - 43 = 9 inches


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What is the domain of the given function? <br> {(3,-2), (6, 1), (-1,4), (5,9), (-4,0)}
grandymaker [24]

Answer:

D = { -4,-1,3,5,6}

Step-by-step explanation:

The domain is the x values  or the inputs

D = { 3,6,-1,5,-4}

We normally put them in order from smallest to largest

D = { -4,-1,3,5,6}

4 0
3 years ago
I need help with this question please!
storchak [24]

Answer:

x > (c-b)/a

Step-by-step explanation:

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Subtract b from each side

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Divide each side by a

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