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Reptile [31]
4 years ago
9

Help!

Mathematics
1 answer:
cricket20 [7]4 years ago
4 0

Answer:

70% = \frac{70}{100} = \frac{7}{10} = 0.7

20% = \frac{20}{100} = \frac{1}{5} = 0.2

Step-by-step explanation:

We know that x% is represented by the fraction \frac{x}{100}.

Now, in the first part, we are given two percentages 75% and 70%.

Now, 75% = \frac{75}{100} = 0.75

and 70% = \frac{70}{100} = \frac{7}{10} = 0.7

Therefore, the second option is correct.

Again, in the second part, we are given two percentages 20% and 25%.

Now, 20% = \frac{20}{100} = \frac{1}{5} = 0.2

and 25% = \frac{25}{100} = \frac{1}{14} = 0.25

Therefore, the third option is correct. (Answer)

You might be interested in
What two numbers add to -10 and multiple to 16
bearhunter [10]

Answer:

-2 and -8

Step-by-step explanation:

Since the sum of the numbers is negative and the product is a positive, we know that two of the digits are negative because a negative time a negative is positive, and two negatives added are negative.

We can do these two ways.

1.) List out the multiples of 16 and see which ones add to -10

-1 (-16)

-2 (-8)

-4 (-4)

Only -2 and -8 add to get -10, so -2 and -8 are the answers.

2.) List the factors that add up to -10

-1 - 9

-2 - 8

-3 - 7

-4 - 6

-5 - 5

When multiplied, only -2 and -8 have a product of 16, so -2 and -8 are the answers.

Hope this helps. if not, please leave a comment and I will respond when I can. :)

7 0
3 years ago
*WILL MARK BRAINLIEST*
tankabanditka [31]

Answer: Charges for  a hardcover book is  $6 and Charges for  a paperback book is  $4

Step-by-step explanation:

1) This problems belongs to linear equation in two variables. From this problem , we can say that we required  a pair of linear equation to solve linear equation in two variables.

2) lets create equation

let the charges for  a hardcover book is represented by variable x

let the charges for  a paperback book is represented by variable y

Creating equation related to Adams work

Adam sold 4 hardcover books and 10 paperback books .

So  Adams earning = (4 × x ) + ( 10 × y)

⇒ 4x + 10y = 64         ------equation 1                 [ given earning of Adam = 64 ]

Creating equation related to Barb work

Barb sold 5 hardcover books and 7 paperbacks for the same prices each

so Barb's earning = (5 × x ) + ( 7 × y)

⇒ 5x + 7y = 58         -------equation 2               [ given earning of Barb = 58 ]

so two equations are

4x + 10y = 64         ------equation 1       And

5x + 7y = 58         ------equation2

where variable x represents charges for  a hardcover book and variable y represents charges for paperback books


3)  lets solve two equation derived in step 2

4x + 10y = 64         ------equation 1       And

5x + 7y = 58         ------equation2

On multiplying equation 1 by 5 and equation 2 by 4 to make coefficient of variable x same.

5 × ( 4x + 10y = 64 )

= 20 x + 50 y = 320     ---------------equation 3

4 × ( 5x + 7y = 58 )

= 20x + 28y = 232       ----------------equation 4

subtracting  equation 3 from equation 4 we get

20x - 20x +50y - 28y = 320 - 232

⇒ 22y = 88

⇒ y = 88/22 = 4

On substituting value of y in equation 1 , we get

4x + 10× 4 = 64

⇒ 4x = 64 - 40 = 24

⇒ x = 24/4 = 6

Hence charges for  a hardcover book = x = $6

And charges for  a paperback book = y = $4








7 0
3 years ago
What is the difference of the following polynomials?
Snowcat [4.5K]
(6x^3-2x^2+4) <span>- (2x^3+4x^2-5)

Subtract the like terms

6x^3 - 2x^3 = 4x^3

-2x^2 - 4x^2 = -6x^2

4 - (-5) = 9

The final answer would be

4x^3 - 6x^2 + 9

</span>
5 0
4 years ago
Read 2 more answers
A flying disc has a 5 ⅖ inch radius. What is its approximate circumference, rounded to the nearest inch?
Ivenika [448]
<h2>Circumference of flying disc is 34 inches</h2><h3><u>Solution:</u></h3>

Given that,

Radius = 5\frac{2}{5}\ inches = \frac{27}{5}\ inches

To find: circumference

<h3><u>The circumference of circle is given as:</u></h3>

C = 2 \pi r

Where, r is the radius of disc

Therefore,

C = 2 \times 3.14 \times \frac{27}{5}\\\\C = 6.28 \times 5.4\\\\C = 33.912

C \approx 34

Thus the circumference of flying disc is 34 inches

3 0
4 years ago
The equation of a line is given below.
alina1380 [7]
The x intercept is 9 and the y is 3
4 0
3 years ago
Read 2 more answers
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