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
Varvara68 [4.7K]
3 years ago
9

What substitution should be used to rewrite 4x4 – 21x2 + 20 = 0 as a quadratic equation?

Mathematics
2 answers:
romanna [79]3 years ago
8 0

35

Step-by-step explanation:

= 32+20-21

= 52-21

= 31

enyata [817]3 years ago
8 0

Answer:

u = x^2

Step-by-step explanation:

on edg 2020

You might be interested in
The population of a town 4 years ago was 50,000
Artyom0805 [142]

Answer:

population will be 79806.

Step-by-step explanation:

Population of a town 4 years ago  was 50,000

Population of town had grown exponentially and present population is 63,124.

So the formula of the population growth will be

A_{n}=A_{o}(r)^{n-1}

Where A_{n} = Final population n = number of years.

           A_{o} = Initial population

           r = rate of increase in population per year.

so  63124 = 50,000 (r)^{4-1}

r^{3}=\frac{63124}{50000}= 1.26428

r=(1.26428)^{\frac{1}{3} }

= 1.0813

Now we have to find the population after 4 years from now.

A_{n} =  63124(1.08)^{4-1}

       =  63124(1.08)^{3}

       = 63124 × 1.264

       = 79806

Therefore, after 4 years from now population will be 79806.

3 0
3 years ago
I need help I’ve tried all day
dmitriy555 [2]

Answer:

184

Step-by-step explanation:

bottom rectangle area = 16 x 10 = 160

middle rectangle area= 3 x 4 = 12

Top triangle= 1/2(bh) = 8 x 3 = 24 (1/2) = 12

160+ 12 +12= 184

8 0
3 years ago
Paul predicts that n stalks of corn planted together will produce (2n2–2n)(2n2–2n) ears of corn. If Paul plants three corn plant
Free_Kalibri [48]
Given that the production of n stalks of corn planted has been modeled by (2n^2-2n), then the approximate ears of corn produced by 3 stalks will be given by:
2n^2-2n
plugging in n=3 in the formula we get:
2(3)^2-2(3)
simplifying we get:
2(9)-6
=18-6
=12
the answer is: 12 ears
6 0
3 years ago
P( total shown=3) rolling two fair number cubes
kondor19780726 [428]
Dice have six sides. So 6 cubed would be 216. Does that sound right?
6 0
3 years ago
(3/5y^4)^-2 simplify this please
Usimov [2.4K]
(\frac{3}{5}y^4)^{-2}=(\frac{5}{3})^2y^{4\times-2}=\frac{25}{9y^8}
8 0
3 years ago
Other questions:
  • Giving Brainliest!!! According to the bar charts, approximately how many females received recommendations for promotion?
    13·2 answers
  • Assuming a normal distribution of 1000 cases, how many cases will be farther away from the mean than + 3 standard deviations?a.A
    5·1 answer
  • Leanne, owner of The Candy Shoppe, wants to make 16-ounce gift bags with a mix of hard peppermint candies and chocolate mints. I
    8·1 answer
  • What is 4x+60=100? Solve for x.
    13·2 answers
  • Twice a number decreased by four is greater than ten, what numbers satisfy this condition
    15·1 answer
  • What is the square root of 32?
    9·2 answers
  • 100 POINTS!!!!
    7·2 answers
  • In a scale drawing the length of a rectangular room is 6 inches and the width is 3 inches and the actual length of the room is 1
    15·1 answer
  • Find the area of each triangle. Round to the nearest tenth.
    9·1 answer
  • Can you please help me with this?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!