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
Verizon [17]
2 years ago
7

My teacher said that 9+10 could equal 21 TELL me how

Mathematics
2 answers:
AlladinOne [14]2 years ago
3 0
Proof:
9+10=?
9 = 3x3
10= 5x2
3 (from 3x3) x 5 (from 5x2) = 15
3 (from 3x3) x 2 (from 5x2) = 6
15+6=21
Therefore 9+10=21

21 CONFIRMED
Georgia [21]2 years ago
3 0
9+10=21 because you think different
3 times 3 equals 9
5 times 2 equals 10
multiply these t=numbers then add then you get 21

You might be interested in
A rectangular prism with a length of 14 meters, width of 5 meters, and height of 4.5 meters. A square pyramid with a base of 8 f
Lubov Fominskaja [6]

Answer:

315 and 128

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
What is the area of a regular octagon with the side length 1 meter
Whitepunk [10]

Answer:

1

Step-by-step explanation:

3 0
2 years ago
What is the distance from the point (a, −b, −4) to the origin?
laiz [17]

Answer:

  \sqrt{a^2+b^2+16}

Step-by-step explanation:

The distance (d) between two points in 3 dimensions is ...

  d = √((x2 -x1)² +(y2 -y1)² +(z2 -z1)²)

Then the distance between (a, -b, -4) and (0, 0, 0) is ...

  d = √((a -0)² +(-b -0)² +(-4 -0)²)

  = √(a² +b² +16)

6 0
3 years ago
Peter has four horses. Each one eats 4 pounds of oats, twice a day. How many pounds of oats does he need to feed his horses for
Fiesta28 [93]
4 poundsx2times per day= 8 pounds
8 pounds x 4 horses=32 pounds
32 poundsx 3 days = 96 pounds
3 0
2 years ago
Read 2 more answers
Bad at math... help please ):
zavuch27 [327]
Smallest side XYZ/ Smallest side ABC = Longest side XYZ/ Longest side ABC
Let longest side XYZ be x
280/112 = x/144
x = (280/112)×144
x = 360
Option D will be your answer

Hope it helped!
3 0
3 years ago
Other questions:
  • Mrs. Petruzziello’s class is working on a math project. There are 5 groups. Mrs. Petruzziello has 3 packs of construction paper
    11·1 answer
  • A group of 7 students was asked, "How many hours did you watch television last week?" Here are their responses. 20,6,17,10,19,15
    6·1 answer
  • X2 + 2x - 3= 5
    7·1 answer
  • on a map the distance between New york and philadelphia is 10.25 inches. if 2 inches equals 16 miles, what is approximate distan
    11·1 answer
  • This is part 2 do a question a already ask 15 point if you answer
    8·2 answers
  • I need help with this as well I can not get it right!
    7·2 answers
  • 2x+3=4 3x+y=solve by graphing and plz show work
    5·2 answers
  • Find the point of intersection of the lines in the figure, given that line A, in red, has equation y=x+3 and line B, in blue, ha
    8·1 answer
  • A. 3<br> B. 0.667<br> C. 0.333<br> D. 6
    5·1 answer
  • A bag of sweets contains 7 strawberry, 9 blueberry. Joe picks two
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!