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Darya [45]
3 years ago
9

Which expression represents 8 less than 3 times a number? 3n-8 8-3n 3-8n 3-8

Mathematics
2 answers:
Daniel [21]3 years ago
5 0

The answer is  A.) 3n - 8

TEA [102]3 years ago
4 0

Answer:

I'm pretty sure its b but I'm not sure I'm sorry if it's wrong

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Find the circumference of the circle iready area and circumference of a circle level g quiz
nekit [7.7K]

Answer:

Formula for circumference of a circle;

C = 2πr

To find the radius, we must find half(1/2) of the diameter.

Since we are given 6, we would find 1/2 of 6 which is <u>3</u>.

Now let's plug in these values into the formula:

C = 2πr

C = 2 x 3.14 x 3

C = 18.84 feet

5 0
3 years ago
Simply the imaginary number square root -45
Paraphin [41]

Answer:

3i\sqrt{5}

Step-by-step explanation:

Using the rule of radicals

\sqrt{a} × \sqrt{b} ⇔ \sqrt{ab}

and \sqrt{-1} = i

Given

\sqrt{-45}

= \sqrt{9(5)(-1)}

= \sqrt{9} × \sqrt{5} × \sqrt{-1}

= 3 × \sqrt{5} × i

= 3i\sqrt{5}

6 0
3 years ago
Eric created a rectangular patio using 1-Foot square paving stones,which are sold in batches by the dozen.The patio measures 7 f
Paladinen [302]
His patio needs 56 stones because 8 multiplied by 7 equals 56. So if the paving stones are sold in batches of 12 (a dozen is equal to 12) then we need to find how many times 12 goes into 56. 12 cannot go into 56 evenly, but 12x5=60 which will be more than enough stones for Eric's patio. So Eric will need 5 batches of paving stones for his patio.
7 0
3 years ago
Priya is stacking building blocks to make a tower. She takes a break when the tower is 2 and 1/2 feet tall, which is 5/8 of the
tensa zangetsu [6.8K]

Answer:

4 feet.

Step-by-step explanation:

Let x be the height of tower when finished.

We have been given that Priya takes a break when the tower is 2 and 1/2 feet tall, which is 5/8 of the height of the tower she wants to build.

This means that 5/8 of x equals 2\frac{1}{2}. Let us represent this information in an equation.

\frac{5}{8}*x=2\frac{1}{2}

Let us convert our given mixed fraction into improper fraction.

\frac{5}{8}*x=\frac{5}{2}

Let us multiply both sides of our equation by 8/5.

\frac{8}{5}\times \frac{5}{8}*x=\frac{5}{2}\times \frac{8}{5}

x=\frac{8}{2}

x=4

Therefore, the tower will be 4 feet tall when finished.

5 0
3 years ago
Find the area of the shaded sector of the circle. Give the exact answer in terms of straight pi.
inessss [21]

The area of the sector that has a central angle of 120 degrees and radius of 8 units is 64π / 3 units²

<h3>Area of a sector</h3>

The area of a sector is defined as follows:

area = ∅ / 360 × πr²

where

  • r = radius
  • ∅ = central angle

Therefore,

r = 8

∅ = 120°

Hence,

area of the sector = 120 / 360 × π × 8²

area of the sector = 1 / 3 × π × 64

area of the sector = 64π / 3 units²

learn more on area here: brainly.com/question/12655272

3 0
3 years ago
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