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Lady bird [3.3K]
3 years ago
5

If the radius of a circle is 20 cm, what is the circumference? (Use π = 3.14)

Mathematics
1 answer:
PIT_PIT [208]3 years ago
4 0
Okay so the circumference of a circle is pi×the diameter or 2×radius× pi. In this case we are given the radius so
C=2×20×3.14
C=40×3.14
C=125.60
The circumference is 125.60cm
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Terry sees this offer refurbished phone 35% off now only ?78 what was the original price
Ronch [10]

Answer:

$223.

Step-by-step explanation:

Let x be the original price of phone.          

We are told that Terry sees this offer refurbished phone 35% off now only $78.

We need to find x such that 35% of x is 78. We can represent this information as:

\frac{35}{100} x=78

0.35 x=78

x=\frac{78}{0.35}    

x=222.8571428571428571\approx 223

Therefore, the original price of phone was $223.

   

3 0
3 years ago
What is the missing value to the equation -3x + 7y = 5x + 2y
Rainbow [258]

Answer:

x = 0

Step-by-step explanation:simplified is 8x-5y=0

5 0
3 years ago
Factor completely: 2x4 − 32.
vazorg [7]

Answer:

Option b) is correct.

The completed factor of given expression is  2(x-2)(x+2)(x^2+4)

Step-by-step explanation:

Given expression is 2x^4-32

To find the completed factor for the given expression:

2x^4-32:

Taking the common number "2" outside  to the above expression we get

2x^4-32=2(x^4-16)

Now rewritting the above  expression as below

=2(x^4-2^4)  (since 16 can be written as the number 2 to the power of 4)

=2((x^2)^2-(2^2)^2)

The above expression is of the form a^2-b^2=(a+b)(a-b)

Here a=x^2 and  b=2^2

Therefore it becomes

=2(x^2+2^2)(x^2-2^2)

=2(x^2+4)(x^2-2^2)  

The above expression is of the form a^2-b^2=(a+b)(a-b)

Here a=x and  b=2

Therefore it becomes

=2(x^2+4)(x+2)(x-2)  

=2(x+2)(x-2)(x^2+4)  

Therefore =2(x+2)(x-2)(x^2+4)  

2x^4-32=2(x-2)(x+2)(x^2+4)  

Option b) is correct.

The completed factor of given expression is  2(x-2)(x+2)(x^2+4)

3 0
3 years ago
Read 2 more answers
A patient is to receive 1.5 grams (g) of an antibiotic in 3 equal
nordsb [41]
1.5 g = 1500 mg

1500 / 250 = 6

the patient should take 6 tablets each dose.
4 0
3 years ago
Yt3=1/2(x+4) in standard form
son4ous [18]
Do you mean 3y? If so, 3y = 1/2x + 2

3y - 1/2x = 2 is standard form
8 0
3 years ago
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