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2 years ago

(05.02 MC) Solve 2 log x = log 64. Ox= 1.8 Ox=8 Ox= 32 Ox = 128

Mathematics

1 answer:

RoseWind [281]2 years ago

3 0

Answer:

x = 8

Step-by-step explanation:

$2logx=log64\\logx^2=log64$

now that both sides has log, you can remove them and leave it as:

$x^{2} =64\\$

take the square root of both sides:

$x = [8, -8]\\x = 8$

logarithmic equations can't have negative solutions, plus -8 isn't an option

i hope this helped!

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What is -3x^2-4x-4=0

ss7ja [257]

Answer:

<h2>no real solution</h2>

Step-by-step explanation:

$-3x^2-4x-4=0\qquad\text{change the signs}\\\\3x^2+4x+4=0\\\\\text{use the quadratic formula:}\\\\\text{for}\ ax^2+bx+c=0\\\\\text{if}\ b^2-4ac0,\ \text{then an equation has two solutions:}\ x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}$

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3 years ago

I don't know how to answer this question.

laiz [17]

Answer:

- 39/8y

Step-by-step explanation:

First you need to find a common denominator:

There is already a y in both denominators, so you don't have to worry about that. Since only one denominator has an 8, the other needs to have an 8, so you need to multiply the first fraction by 8 → - 4/y * 8 = - 32/8y

From here you can subtract the numerators:

- 32/8y +(- 7/8y) = - 39/8y

Because you are adding a negative to a negative, it makes the number mroe negative

I hope this helps!

3 0

3 years ago

Don’t know this one

tatiyna

Answer:

Step-by-step explanation:

The answer is B because in order for the square root of a number to be equal to another number, the answer squared should be the number under the square root.

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4 years ago

Read 2 more answers

What is the midpoint of a segment with These endpoints (-6,-9) and (16,5)

lora16 [44]

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malfutka [58]

Answer:

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Step-by-step explanation:

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