1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
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.

You might be interested in
In ΔFGH, what is the measure of < H?
kogti [31]
X + x - 1 + 43 = 180.  Solve for x.  2x +42 = 180 and 2x = 138.  Therefore, x = 69.  If x = 69, then angle H is 68 and angle G is 69.  68 + 69 + 43 = 180.

3 0
3 years ago
Tan(x+pi/2)= negative cot x
DIA [1.3K]
I'm only going to alter the left hand side. The right side will stay the same the entire time

I'll use the identity tan(x) = sin(x)/cos(x) and cot(x) = cos(x)/sin(x)
I'll also use sin(x+y) = sin(x)cos(y)+cos(x)sin(y) and cos(x+y) = cos(x)cos(y)-sin(x)sin(y)

So with that in mind, this is how the steps would look:

tan(x+pi/2) = -cot x
sin(x+pi/2)/cos(x+pi/2) = -cot x
(sin(x)cos(pi/2)+cos(x)sin(pi/2))/(cos(x)cos(pi/2)-sin(x)sin(pi/2)) = -cot x
(sin(x)*0+cos(x)*1)/(cos(x)*0-sin(x)*1) = -cot x
(0+cos(x))/(-sin(x)-0) = -cot x
(cos(x))/(-sin(x)) = -cot x
-cot x = -cot x

Identity is confirmed

6 0
3 years ago
Solve 2x^2+16x+34=0?????
stiks02 [169]

Answer:

2(x^{2}+8x+17)

Step-by-step explanation:

Factor out 2 of the equation.

3 0
3 years ago
Read 2 more answers
Use the Distributive Property on 45x-6
Alexandra [31]

Answer:

<h3>180</h3>

Step-by-step explanation:

<h3>45 × -6 = 45 × [10+(-6)]</h3><h3>45 × (10-6)</h3><h3>45 × 4</h3><h3>180</h3>
5 0
3 years ago
Find the gradient of the line 2x+7y=14
Alex777 [14]

Answer:

-2/7

Step-by-step explanation:

2x+7y=14

7y=-2x+14

divide by 7

y=-2/7 x+2

4 0
3 years ago
Other questions:
  • The label on the car's antifreeze container claims to protect the car between −40°C and 125°C. To convert Celsius temperature t
    8·2 answers
  • Maria solved the equation. <br><br> What methods did she use and in what order did she use them?
    6·2 answers
  • What is the first step to simplify the expression 5x – x(2 – 3x) 2?
    15·1 answer
  • What is (-3)-(-6)×(-9)?
    13·1 answer
  • What is 234% of a dollar
    7·1 answer
  • Need help with question 9
    11·1 answer
  • Six times the quotient of twenty-one and three is forty-two.
    7·1 answer
  • Please help<br> ZB=<br> Round your answer to the nearest hundredth.<br> B.<br> 6<br> 5<br> с
    11·1 answer
  • Use a table to find two consecutive integers between which the solution lies.
    8·1 answer
  • Josiaanswer this is it josia the question
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!