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
Allushta [10]
3 years ago
13

(7z^3+42z^2-15z+1)- (36z^2+12z-21)​

Mathematics
2 answers:
My name is Ann [436]3 years ago
6 0

Answer:

7z^3+6z^2-27z+22

Step-by-step explanation:

The given question is of subtraction:

So,

(7z^3+42z^2-15z+1)- (36z^2+12z-21)​

=7z^3+42z^2-15z+1-36z^2-12z+21

Combining alike terms to simplify

=​7z^3+42z^2-36z^2-15z-12z+1+21

=7z^3+6z^2-27z+22

So the answer in simplified form is:

7z^3+6z^2-27z+22 ..

zalisa [80]3 years ago
4 0

Answer:

7z³ + 6z² - 27z + 22

Step-by-step explanation:

It is given an expression in variable z,

(7z³ + 42z²  - 15z + 1) - (36z² + 12z - 21)​

<u>To find the simplified form</u>

(7z³ + 42z²  - 15z + 1) - (36z² + 12z - 21)​

 = (7z³ + 42z²  - 15z + 1 - 36z² - 12z +  21)​

 = 7z³ + 42z² - 36z² - 15z -12z + 1 + 21

 = 7z³ + 6z² - 27z + 22

Therefore the simplified expression is = 7z³ + 6z² - 27z + 22

You might be interested in
Pls answer :) im timed
OLga [1]

Answer:

option 3 is the answer mark me brainliest ❤

8 0
3 years ago
Two chemical companies can supply a raw material. The concentration of a particular element in this material is important. The m
svp [43]

Answer:

As the calculated F lies in the acceptance region therefore we conclude that there is not sufficient evidence to support the claim that the variability in concentration may differ for the two companies. Hence Ha is rejected and H0 is accepted.

Step-by-step explanation:

As we suspect the variability of concentration F - test is applied.

n1=10    s1=4.7

n2=16      s2=5.8

And α = 0.05.

The null and alternate hypothesis are

H0: σ₁²=σ₂²       Ha:  σ₁²≠σ₂²

The null hypothesis is  the variability in concentration does not  differ for the two companies.

against the claim

the variability in concentration may differ for the two companies

The critical region F∝(υ1,υ2) = F(0.025)9,15= 3.12

and 1/F∝(υ1,υ2) = 1/3.77= 0.26533

where υ1= n1-1= 10-1= 9 and υ2= n2-1= 16-1= 15

Test Statistic

F = s₁²/s₂²

F= 4.7²/5.8²=0.6566

Conclusion :

As the calculated F lies in the acceptance region therefore we conclude that there is not sufficient evidence to support the claim that the variability in concentration may differ for the two companies. Hence Ha is rejected and H0 is accepted.

3 0
3 years ago
Symplify the expession 71 2/3% helppp
Ksju [112]

Answer:

0.71(6)

Step-by-step explanation:

the ending of "6" is forever.

7 0
3 years ago
(YOU WILL BE MARKED BRAINLIEST IF YOU WRITE A SHORT STORY FOR THIS MATH PROBLEM!!)
-BARSIC- [3]

Answer:

  Once upon a time a troll was walking down a deep dark hallway, there was no light anywhere that he could see and he was starting to get scared of what could happen to him. But then out of the blue he saw something, something was would change his life forever, he saw a pigeon. Now you might think "Oh, a pigeon, how could that have changed his life?' Now the answer is kind of mundane but is deeper than you might think. The simple answer as to why the pigeon would change his life is because it gave the troll hope, hope that there is an exit. You see, the troll thought if the pigeon found there way into this pitch black hallway, then there must be a way in and hence a way out.

  Now listen here, there's something that I wasn't telling you at the beginning of the story about the pigeon, the pigeon was also glowing. This is very useful obviously because it gave the troll some kind of light. Again, it gave the troll hope. Now, being a troll you might think that he would just snatch the pigeon and hold it for light, but this troll wasn't like other trolls, he had the capability to think before he used brute force to change something. So what the troll though was "If I just follow the pigeon then it might lead me to the exit because they have natural navigation in their brains"

 Let's skip a while into the future, the troll followed and followed the pigeon for what felt like days, but in reality it was more like 3 hours. But then, the troll saw something that he thought he would never see again; sun light. As soon as the troll saw this, he started running and running towards the light, but as fast as he was running, the light seemed to get farther and farther away from him, then... POOF the troll was gone...

  The troll found himself in a very lit up room, almost pure white all around him, which scorched his eyes because he was just in a pitch black room for hours. His ears were ringing and he was in pain, after a while all of that stopped, he was able to see clearly, he felt great, and his ears stopped ringing. What he saw was a very tall thin figure looking down at him from a room of pure white. The figure bent their neck and got right in the trolls face. The figure brought his left hand up to the trolls face, right next to his ear and snapped. The sound of a monstrous click sound right in the trolls ears hurt. The troll jumped back in fear but as soon as the click happened he saw a thing in his vision, a thing he new wasn't actually in the real world as it seemed to follow his eyes where ever he looked. It was, now i know this might sound stupid, I'm not here to imagine a story, I'm simply here to reenact the story of the troll. What he saw was a math problem, a grid was in his vision. It was a 4 by 6 grid.

 The tall shadow figure was now back where the troll saw him originally, he was no longer bent and he seemed to not have arms anymore, just a tall dark figure with a cloak. The troll then began to hear a voice which seemed to come from everywhere. It was a deep voice that was very muffled, it said "Do this math problem and go back to your world. Get it correct and everything will go back to normal, but fail; and I'll have your soul" The troll was about to have an adventure of a lifetime...

Step-by-step explanation:

I legit came up with this on the spot, did you like it? XD

May I have brainliest please :)

8 0
3 years ago
In fixed deposit, a bank gives 10% interest compounded annually for senior citizens. How many complete years will it take for a
Mazyrski [523]

Answer: 8 years

Step-by-step explanation:

You can find this out use the Rule of 72. By dividing 72 by the fixed interest rate, you can estimate the amount of time it will take for an investment to double in size:

= 72/10

= 7.2 years

= 8 complete years

Example:

Assume they invested $1,000. Interest rate is 10%.

Amount after 8 years will be:

= 1,000 * (1 + 10%)⁸

=$2,143.59

<em>Investment is now more than double. </em>

4 0
3 years ago
Other questions:
  • How do you find degree measures? How would you solve this question?
    11·1 answer
  • The value of a collector’s item is expected to increase exponentially each year. The item is purchased for $500. After 2 years,
    8·1 answer
  • You have a function that takes in an X value and produces a Y value. The y value equals 24 times the x value, plus 4 more. What'
    7·1 answer
  • A strip of wood 78 inches long is to be cut into pieces 3 3/4 inches long. How many pieces can be cut?
    10·1 answer
  • If everybody on the team scores 6 points, and the team has a total of 42 points, how many people are on the team? 6 p = 42 7 p =
    11·2 answers
  • Find the radius of the button.<br><br>and the length is 5cm<br><br>How do i slove
    14·1 answer
  • What can 45/8 be simplified down to?
    7·1 answer
  • Which is the graph of the linear function that is represented by the equation y = 1/2x-2?​
    7·1 answer
  • One of a 45° 45° 90° trangle measures
    14·1 answer
  • Find the unknown side of the triangle
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!