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3 years ago

If 5(3x – 7 ) = 20, then what is 6x – 8? * 8 12 14 16

Mathematics

1 answer:

den301095 [7]3 years ago

5 0

Step-by-step explanation:

hope it helps............

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Help please due today

Shkiper50 [21]

Answer:

Step-by-step explanation:

7 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

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

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

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

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

Round 104229 to the nearest ten thousand

saul85 [17]

That is a one hundred thousand number. To round it you need to know this: 5 or more make it go up (make it the next number. For example: 19,530. It would be rounded to 20,000 because of the 5) 4 or less let it be (EXAMPLE : 8,213. It would be 8,000. Because of the 4.)

Then you need to find the ten thousand. In this case it is the 0. (104,229) Then you round it off to 100,000. The answer is 100,000.

3 0

4 years ago

Hurry in test Brainliest!!!

tamaranim1 [39]

Answer:

Step-by-step explanation:

m = $\frac{y_{2} - y_{1} }{x_{2} -x_{1} }$