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3 years ago

Simplify the variable expression by evaluating its numerical part 4 * 7 * n

Mathematics

2 answers:

photoshop1234 [79]3 years ago

7 0

The ancer will be 28nx

Ad libitum [116K]3 years ago

3 0

We can multiply the 4 and 7 together.
28 * n

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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

3 years ago

Damon can flip 5 pancakes in 20 seconds,

katen-ka-za [31]

Answer:

24 + 30 = 54 pancakes flipped in 2 minutes :)

Step-by-step explanation:

damon = 5 pancakes in 20 seconds

we do 20 x 3 and 5 x 3 to find how many pancakes he can flip in a minute

15 pancakes and a minute, we then multiply them by 2 to get the amount for 2 minutes

30 pancakes flipped in 2 minutes

Hailey = 2 pancakes in 10 seconds. to make it an equal amount of pancakes per second with damon, i will multiply them by 2 to have 4 pancakes in 20 seconds

we will then do 4 x 3 and 20 x 3 to find out how many pancakes per minute

then we multiply by 2 for 2 minutes

7 0

3 years ago

Read 2 more answers

Question 2(Multiple Choice Worth 1 points)

kramer

Answer:

it is a linear expression

6 0

2 years ago

PLEASE HELP ME<br> Find the total surface area of the figure shown.

otez555 [7]

Answer:

I think it's C but I might be

Step-by-step explanation:

8 0

3 years ago

93 times 10 to the sixth power

Varvara68 [4.7K]

93 x 10^6 =
93 x 1,000,000 = 93,000,000

6 0

3 years ago