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choli [55]
3 years ago
14

Help me out with this one please

Mathematics
2 answers:
Anna11 [10]3 years ago
8 0

Answer:

5) x = -1

6) x = 2

Step-by-step explanation:

5) 5 + 2x + 6 = x + 10

   2x + 11 = x + 10

   2x + 1 = x

   1 = -x

   -1 = x

6) (9x + 7) + (-3x + 20) = 39

    6x + 27 = 39

    6x = 12

     x = 2

dlinn [17]3 years ago
8 0

Answer:

For question 5, x= -1

Step-by-step explanation:

Segment Addition Postulate = ab+bc=ac

For Question 5,

(a)     +    (b)  = (c)  

5+2x  +   6    = x+10

5+2x+6=x+10

<u>To solve that, </u>

5+2x+6=x+10

<u>Add 5+6 </u>

11+2x=x+10

<u>Subtract 11 from both sides</u>

2x= x-1

x-1=2x

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First, let's check if the sequence is geometric or arithmetric.

If arithmetric, the sequence will have common difference.

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To find the value of y, you can check the sequence. If we try subtracting the sequences, the differences are different. That means the sequences are not arithmetric. That only leaves the geometric sequence.

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From the:

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Substitute the values in.

\displaystyle \large{ \frac{y}{2}  =  - 3}

Multiply the whole equation by 2 to isolate y.

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