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3 years ago

12

Solve this system of linear equations. Separate

1 answer:

Katyanochek1 [597]3 years ago

5 0

Answer:

good question

Step-by-step explanation:

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At the fundraiser, there were only 3 prices for books: $2. $5 and $10. There were 6 more $5 books sold than $10 books. There wer

Setler79 [48]

Answer:

c

Step-by-step explanation:

3 0

3 years ago

2. Suppose (220)_b and (251)_b are the squares of consecutive integers. Determine b.

Andrei [34K]

Let $x$ and $x+1$ be these consecutive integers. For some base $b$ , we can write

$(x_{10})^2=220_b=2b^2+2b$

$((x+1)_{10})^2=251_b=2b^2+5b+1$

If

$x^2=2b^2+2b$

then

$x^2+1=2b^2+2b+1$

Now,

$x^2+2x+1=2b^2+5b+1$

$2x+2b^2+2b+1=2b^2+5b+1$

$\implies2x=3b$

Squaring both sides gives

$4x^2=9b^2$

and so

$4(2b^2+2b)=9b^2$

$\implies8b^2+8b=9b^2$

$\implies b^2-8b=0\implies\boxed{b=8}$

(because the base has to be non-zero)

3 0

3 years ago

vagabundo [1.1K]

Answer:

I can not answer for some reason

i am so so sorry i really was trying

Step-by-step explanation:

6 0

2 years ago

Solve for x. assume that lines which appear to be tangent are tangent

Setler [38]

Answer: 9

Step-by-step explanation:

2X+5=3X-4

-2X. -2X

5= X-4

+4

9=X

7 0

3 years ago

Consider the system of equations.

Paladinen [302]

Step-by-step explanation:

4x-9y=-9 1

2x +3y=3 2

1 - 2(2)

4x -9y=-9

(2)* -4x -6y=6

________

0-15y=-3

15y=3

y=3/15

y=1/5

6 0

2 years ago

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