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ololo11 [35]
3 years ago
9

Increase 400 by 10% and then decrease the answer by 10%

Mathematics
2 answers:
makvit [3.9K]3 years ago
8 0

Answer:80

Assume the number to be 400 for instance,

10% of 400 increased = 400 + ( 10/100 × 400 )

= 400 + 40 = 440

The resulting number decreased by its 10% = 400 - (10/100 × 400)

= 400 - 40 = 360

Now, net decrease = 440 - 360 = 80

erik [133]3 years ago
7 0

Answer:

400.

10% of 400 is 40 (Simply reduce the hundreds place to the tens place)

So now we have 440.

Decrease it by 10% again, and that brings you right back to 400.

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Which of the following points lies on the circle whose center is at the origin and whose radius is 10?
Naddik [55]
Since the standard form of the circle is:

(x-h)^2+(y-k)^2=r^2, and (h,k)=(0,0) and r=10 so we have:

x^2+y^2=100   Looking at the points you have:

(√10, 0) does not work as (√10)^2+0^2=10+0=10

(0, 2√5) does not work as 0^2+(2√5)^2=0+20=20

(5√2, 5√2) works as (5√2)^2+(5√2)^2=50+50=100
6 0
4 years ago
A graduated cylinder with 10.0 mL of water ha mass of 25.0 g. 51 paper clips are added to the graduated cylinder . The total mas
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Answer: The density of the paper clips is 0.64 g/ml.

Step-by-step explanation:

Given : Volume of water = 10.0 mL

mass of water =  25.0 g

After 51 clips added to water , the total mass = 28 g

Total volume = 14.7

Mass of clips =  total mass - mass of water

= 28 g-25g = 3g

Volume of clips = Total volume- Volume of water

= 14.7- 10.0 = 4.7 ml

Density of paper clips =\dfrac{\text{Mass of paper clips}}{\text{Volume of paper clips}}

=\dfrac{3}{4.7}=0.638297\approx0.64\ g/ml

Hence, the density of the paper clips is 0.64 g/ml.

6 0
4 years ago
-6x + 5xy - 9y - 3x + 7 =....need help again!!sorry​
melomori [17]

Answer:

=5xy−9x−9y+7

Step-by-step explanation:

Let's simplify step-by-step.

−6x+5xy−9y−3x+7

=−6x+5xy+−9y+−3x+7

Combine Like Terms:

=−6x+5xy+−9y+−3x+7

=(5xy)+(−6x+−3x)+(−9y)+(7)

=5xy+−9x+−9y+7

Answer:

=5xy−9x−9y+7

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Distribute $1000 into three parts so that one part will be three times as large as the second and the third part will be as larg
Over [174]

Answer:

See below

Step-by-step explanation:

x = part 1

3x = part 2

x + 3x  = part 3       summed, they equal 1000

x    +     3x      +   x + 3x = 1000

8x = 1000

<u>x = 125       3x = 385      third part = 500 </u>

3 0
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Find the y-intercept of the line: x + 4y + 8 = 0
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Answer:

(0,-2)

Step-by-step explanation:

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