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2 years ago

8 squared? please answer i have limited time

Mathematics

2 answers:

marta [7]2 years ago

8 0

Answer:

Step-by-step explanation:

sergeinik [125]2 years ago

5 0

Answer:

Step-by-step explanation:

to square smt means to multiply it by itself

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Solve the trig. equation for all angles between 0-360. <br> 2cos²θ=1

dsp73

I think it 2 because did on paper

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2 years ago

Which radical expressions are equivalent to the exponential expression below ? Check all that apply . (13 + 8) ^ (1/2) A. (13 +

Fantom [35]

Answer:

$(B)\sqrt{21}\\(C)\sqrt{13+8}$

Step-by-step explanation:

Given the expression $(13 + 8) ^{1/2}$

Using law of indices: $a^{1/2}=\sqrt{a}$

$(13 + 8) ^{1/2}=\sqrt{13+8}$

Also:13+8=21

Therefore:

$(13 + 8) ^{1/2}=21^{1/2}\\=\sqrt{21}$

8 0

3 years ago

Precalc.

viktelen [127]

Domain: x>0.

$(\log_2x)^2+7\log_2x+12=0$

Substitute $t=\log_2x\in\mathbb{R}$ . We have:

$t^2+7t+12=0\\\\a=1\qquad b=7\qquad c=12\\\\\\\Delta=b^2-4ac=7^2-4\cdot1\cdot12=49-48=1\\\\\sqrt{\Delta}=\sqrt{1}=1\\\\\\
t_1=\dfrac{-b-\sqrt{\Delta}}{2a}=\dfrac{-7-1}{2}=\dfrac{-8}{2}=-4\\\\\\
t_2=\dfrac{-b+\sqrt{\Delta}}{2a}=\dfrac{-7+1}{2}=\dfrac{-6}{2}=-3$

For t₁ there will be:

$\log_2x=t_1\\\\\log_2x=-4\\\\2^{-4}=x\\\\x=\dfrac{1}{2^4}\\\\\\x=\dfrac{1}{16}=0,0625\\\\\\\boxed{x\approx0,063}$

and for t₂:

$\log_2x=t_2\\\\\log_2x=-3\\\\2^{-3}=x\\\\x=\dfrac{1}{2^3}\\\\\\x=\dfrac{1}{8}\\\\\\\boxed{x=0,125}$

Answer d)

6 0

2 years ago

Using the discriminant determine the number of real solutions -4x^2+20x-25=0

seraphim [82]

I think it's c I'm not too sure

5 0

3 years ago

Read 2 more answers

Find f(-5) if f(x) = X + 11.

fgiga [73]

Answer:

f(-5) = 6

Step-by-step explanation:

f(x) = x + 11

Let x = -5

f(-5) = -5+11

f(-5) = 6

4 0

3 years ago

8 squared? please answer i have limited time​

8 squared? please answer i have limited time