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
IRINA_888 [86]
3 years ago
13

John was given a math equation. He completed it in 5 seconds. Is his answer correct? If it is, show how he got the answer. Show

your work. See picture down below.

Mathematics
1 answer:
Maru [420]3 years ago
7 0

Yes; his answer is correct.

John can do this by multiple ways, but most likely he just remembered this one. Here are some ways.

1. He used his fingers; he put 1 finger, then another finger, and got 2 fingers up. The answer is 2.

2. He remembered it; usually Kindergarteners learn this and this is very easy to remember.

3. He used the things around him; I have 1 crayon then add another, how many do I have? 2.

You might be interested in
Please help it’s due in 10 minutes!!!
Virty [35]

Answer:

Step-by-step explanation:

its B

just chuck it in wolfram alpha

3 0
2 years ago
which statement is true about the equation 3/4z-1/4z+3=2/4z+5. It has no solution. It has one solution. It has two solutions. It
kozerog [31]
3/4z - 1/4z + 3 = 2/4z + 5
3/4z - 1/4z - 2/4z = 5 - 3
2/4z - 2/4z = 2
0 ≠ 2
----------------------------
<span>It has no solution.</span>
3 0
3 years ago
Read 2 more answers
Can you please help me with the questions I will give you brainliest.
KiRa [710]

Answer:

C the First page

Step-by-step explanation:

1) you input the 2 into the T So the equation would look like this

15+2.5*(times) 2

2) I'm not sure for the second

3) A because you are using the number given then multiplying.

1.58* times 5 = 7.5

But the starting number would be 1.5 sense that's  the first number given

No one report me please.

8 0
3 years ago
Solve the following congruence equations for X a) 8x = 1(mod 13) b) 8x = 4(mod 13) c) 99x = 5(mod 13)
xxMikexx [17]

Answer:

a) 5+13k  where k is integer

b) 20+13k where k is integer

c)12+13k where k is integer

Step-by-step explanation:

(a)

8x \equiv 1 (mod 13) \text{ means } 8x-1=13k.

8x-1=13k

Subtract 13k on both sides:

8x-13k-1=0

Add 1 on both sides:

8x-13k=1

I'm going to use Euclidean Algorithm.

13=8(1)+5

8=5(1)+3

5=3(1)+2

3=2(1)+1

Now backwards through the equations:

3-2=1

3-(5-3)=1

3-5+3=1

(8-5)-5+(8-5)=1

2(8)-3(5)=1

2(8)-3(13-8)=1

5(8)-3(13)=1

So compare this to:

8x-13k=1

We see that x is 5 while k is 3.

Anyways 5 is a solution or 5+13k is a solution where k is an integer.

b)

8x \equiv 4 (mod 13)

8x-4=13k

Subtract 13k on both sides:

8x-13k-4=0

Add 4 on both sides:

8x-13k=4

We got this from above:

5(8)-3(13)=1

If we multiply both sides by 4 we get:

8(20)-13(12)=4

So x=20 and 20+13k is also a solution where k is an integer.

c)

[tex]99x \equiv 5 (mod 13)[/tex

99x-5=13k

Subtract 13k on both sides:

99x-13k-5=0

Add 5 on both sides:

99x-13k=5

Using Euclidean Algorithm:

99=13(7)+8

13=8(1)+5

Go back through the equations:

13-8=5

13-(99-13(7))=5

8(13)-99=5

99(-1)+8(13)=5

Compare this to 99x-13k=5 and see that x=-1 or -1+13=12 or 12+13k is a solution where k is an integer.

8 0
3 years ago
Read 2 more answers
Geometry Helps please<br> (Only correct Answers only please) Thank you!
Elza [17]

Answer:

37.68 units³

Step-by-step explanation:

To calculate the volume of a cone, the formula is:

V = π x r² x ( h / 3 )

Simply input the corresponding numbers into the equation:

V = π x ( 2 )² x ( 9 / 3 )

V = π x 4 x ( 3 )

V = π x 12

V = 3.14 x 12

V = 37.68 units³

If we use 3.14 for pi, the answer comes out to 37.68 units³

6 0
3 years ago
Other questions:
  • Which of these is the quadratic parent function?
    15·1 answer
  • Math question down below
    8·1 answer
  • Which of the following is a recurring fee?
    14·2 answers
  • PLS HELP
    10·1 answer
  • You sell tickets for admission to your school play and collect a total of $104.Admission prices $6 for adults and $4 for childre
    12·1 answer
  • Use the Exterior Angles Theorem to find the measure of each angle in degrees.​
    11·1 answer
  • HELLLPP ANY HELPS PLEASE I NEED HELP I AM RUNNING OUT OF TIME !!
    10·2 answers
  • Which of the following points lie on a line that passes through the origin with a slope of −25? Select all that apply.
    8·1 answer
  • David created two functions. Function A can be represented by y=3/4x +2. Function be is represented by the graph below.
    13·2 answers
  • Arrange the functions in ascending order, starting with the function that eventually has the least value and ending with the fun
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!