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
marishachu [46]
2 years ago
8

What figure can be made with exactly 420 squares?

Mathematics
1 answer:
Natali [406]2 years ago
4 0
5. The 5th figure will have 30 tiles.
6. The 6th figure will have 42 tiles.
7. The pattern is non-linear (quadratic).
8. The 20th figure can be made with 420 tiles.

_____
The Nth figure is made with n*(n+1) tiles. To answer question 8, you must solve
.. n(n +1) = 420
.. n^2 +n -420 = 0
.. (n +21)(n -20) = 0
.. n = 20 or -21 . . . . the negative solution is extraneous
You might be interested in
Help with thisssssssssssssss
Orlov [11]

Answer:

its 134

Step-by-step explanation:

6 0
11 months ago
(2y+1.6)/0.8=30/2.5<br> Please Help!<br> Solve for Y
galina1969 [7]

y = 4

first note that the right side simplifies to 12, equation can be written

\frac{2y+1.6}{0.8} = 12 ( multiply both sides by 0.8 )

2y + 1.6 = 9.6 ( subtract 1.6 from both sides )

2y = 8 ( divide both sides by 2 )

y = 4


3 0
3 years ago
Read 2 more answers
What's the answer and the work
erma4kov [3.2K]
For the first 6 trips she walked 3.2 kilometers and for the next 6 she made another 3.2 which would be 6.4 kilometers for 12 trips now she made 3 more trips which is half of the amount she originally did so it would be half of the distance also so 3.2 divided by 2 is 1.6 kilometers so for the last 3 trips she walked 1.6 kilometers. now add up all the distance she walked so 6.4 kilometers for the 12 trips plus the 1.6 for the other 3 trips is 8 kilometers in total. she walked 8 kilometers after 15 trips.
3 0
3 years ago
A university class has 16 students enrolled, 4 of whom are freshmen.
joja [24]

Answer:

1/4

Step-by-step explanation:

The total number of students = 16

4 are freshman

Therefore,

The probability of choosing a freshman is 4/16 which reduces to 1/4

3 0
2 years ago
Can anyone really post anything other than math?
sammy [17]

Answer:

well yes, but no

Step-by-step explanation:

we can post other things than math but we shouldn't post it in the math forum

4 0
2 years ago
Read 2 more answers
Other questions:
  • If a single card is drawn from a standard 52-card deck, in how many ways could it be a diamond or a face card (a face card is a
    6·2 answers
  • Y=x^2+14x+49 focus point
    9·1 answer
  • What is the common ratio of the geometric sequence?
    13·1 answer
  • Estimate by rounding to the nearest hundred 657 - 125.
    8·1 answer
  • 50 points! name the postulate or theorem .
    5·2 answers
  • Factor completely<br> 4x^2-1
    10·2 answers
  • there are 77 students in the student council. The ratio of girls to boys is 7:4. How many girls are in the student council? What
    5·1 answer
  • A company that produces fine crystal knows from experience that 15% of its goblets havecosmetic flaws, while the remaining 85% a
    10·1 answer
  • Math problem time lol
    13·2 answers
  • Find the exact value without a calculator. Tan 7pi/12=sin7pi/6/2 /cos7pi/6/2
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!