3 years ago

2. Which variable will eliminate? * 3x +6y=27 -3x+8y= 1

Mathematics

2 answers:

Anarel [89]3 years ago

5 0

9x=27
x=3
———
-3*3+8y=1
5\4

nevsk [136]3 years ago

3 0

Answer:

the x variable

Step-by-step explanation:

Given the 2 equations

3x + 6y = 27 → (1)

- 3x + 8y = 1 → (2)

Since the signs of the coefficients of x are opposite, then adding them will eliminate the x- term, that is

Add (1) and (2) term by term

0 + 14y = 28

14y = 28 ( divide both sides by 14 )

y = 2

Then substitute y = 2 into either equation for corresponding value of x

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Find the first four terms of the sequence given a1=31 and an+1=an−3

Alex

Step-by-step explanation:

Given the formula

a(n+1)=an−3

The first term a(1) = 31

For the second term

a(2)

We have

a( 1 + 1) = a(1) - 3

a(2) = 31 - 3

a(2) = 28

For the third term

a(3)

We have

a(2+1) = a(2) - 3

a(3) = 28 - 3

a(3) = 25

For the fourth term

a(4)

That's

a(3+1) = a(3) - 3

a(4) = 25 - 3

a(4) = 22

Hope this helps you

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