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Readme [11.4K]
3 years ago
9

Please help i will mark brainly

Mathematics
2 answers:
Minchanka [31]3 years ago
6 0
The answer would be positive since the subtraction sign and the negative cancel each other out and makes the negative a positive which means at the end they will both be positive and when you add numbers with the same sign the answer will have that sign
Otrada [13]3 years ago
4 0

It would be positive. The minus sign makes the negative a positive and adds the two. Just remember keep, change, change.

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If SF = 5x + 2, SK = 27, and KF = 3x - 1,<br> find KF.
kondor19780726 [428]

Answer:

KF = 35

Step-by-step explanation:

Since it's a line with K in the middle, we know that the distance SF is the same as SK + KF.

(Start at S, first go to K, then continue to F. You've traveled the same distance as from S to F.)

SF = SK + KF

Let's put in the values we got.

5x + 2 = 27 + (3x -1)

Opening the parenthesis.

5x + 2 = 27 + 3x - 1

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Now let's subtract 3x from both sides.

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Now, subtract 2 from both sides.

2x = 24

If we divide by 2...

x = 12

We know that...

KF = 3x -1

Since x is 12, let's put that in.

KF = 3 * 12 - 1 = 36 - 1 = 35

Answer: KF is 35 !

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