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3 years ago

3(x+1)(x-1)=7x (By quadratic formula)

Mathematics

1 answer:

Vlada [557]3 years ago

3 0

Answer:

Step-by-step explanation:

$3(x^{2} - 1) = 7x\\ 3x^{2} - 7x - 3 =0$

x = [-(-7)± $\sqrt{49 - 4(3)(-3)}$ ] / 2(3)

x= (7 ±√85) / 6

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Determine if the sequence is geometric. If it is, find the common ratio. ( -4, 12, -36, 108, ... )

Naya [18.7K]

Step-by-step explanation:

to know whether it is geometric progression or not, you need to find the common ratio. to find the ratio divide the (n+1)th term by n th term

so, 12/-4 = -3

also, -36/12 = -3

here u see the ratio is always same, i.e., common ratio.

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3 years ago

For each inequality draw a number line and show all points that satisfy it.

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Step-by-step explanation:

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3 years ago

Can anyone help me solve this?

Alecsey [184]

Answer:

Step-by-step explanation:

$(\sqrt{z} +\sqrt{22})(\sqrt{z} -\sqrt{22})=35$

Subtract both sides from 35

$(\sqrt{z}+\sqrt{22} (\sqrt{z} -\sqrt{22})-35=35-35$

Simplify:

$(\sqrt{z})^{2} -57=0$

Factor $(\sqrt{z})^{2} -57: (\sqrt{z}+\sqrt{57}) (\sqrt{z}-\sqrt{57})$ =0

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3 years ago

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HELP!!!!!!!!!!!!!!ASAP!!!!!!!!!!!!!!! PLEASE!!!!!!!!!!

Yuliya22 [10]

Answer:

I did this its A

Step-by-step explanation:

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3 years ago

Roscoe rides his bike at least 10 miles but not more than 30 miles. He rides at an average rate of 10.5 miles per hour. The amou

zheka24 [161]

Actually, the domain is the possible set of input values of a function that will make the function fit the specific criteria. In this case, the input value is m, where m is the number of miles that is travelled. The criteria is to travel at least 10 miles but not more than 30 miles, therefore the domain should be:

All real numbers from 10 to 30, inclusive

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I cannot figure out why the choices are far from the answer.

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4 years ago