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
Firlakuza [10]
2 years ago
8

The four digit numeral 3AA1 is divisible by 9. What digit does A represent

Mathematics
1 answer:
dexar [7]2 years ago
4 0

Answer:

A = 2, the number is 3221

Step-by-step explanation:

In order for the number to be divisible by 9, the sum of it's digit has to be divisible by 9.

In our case, 4+A+A+1= 9k where k is an integer. the easiest way happens when k=1

5+2A= 9 \rightarrow 2A=4 \rightarrow A = 2

Higher values of k will likely most work (with k=2 you get A to be a non-integer, which can't work since it's the digit of a number, and with higher values of K you're not getting a number in base 10.

You might be interested in
Need help 8th grade math
Yanka [14]
The answer is the 3rd one
6 0
3 years ago
What is 4/5 divided 1/3
vova2212 [387]
The answer would be 2.4, or in fraction form 12/5. Please mark brainliest <3
5 0
3 years ago
Read 2 more answers
Solve the system by substitution x=-8y-15 2x+5y=-8
Ghella [55]

To solve this system by substitution, we must substitute in the value we are given for x in terms of y (the first equation) into the second equation.  This is modeled below:

x = -8y - 15

2x + 5y = -8

2 (-8y - 15) + 5y = -8

Now, we should solve this new equation for y.  To begin, we should use the distributive property to get rid of the parentheses on the left side of the equation and begin the simplification process.

-16y - 30 + 5y = -8

Next, we can combine like terms on the left side of the equation by adding together the two terms that both contain the variable y.

-11y - 30 = -8

Next, we should add 30 to both sides in order to move all of the constant (number) terms to the left side of the equation.

-11y = 22

After that, we should divide both sides of the equation by -11 in order to get the variable y alone.

y = -2

Now, we can substitute our value for y back into one of our original equations (it doesn't matter which one you choose; they will yield the same answer).

x = -8y - 15

x = -8(-2) - 15

To simplify, we should following the order of operations outlined by PEMDAS and compute the multiplication and then the subtraction.

x = 16 - 15

x = 1

Therefore, the answer to the system is x = 1 and y = -2, or (1,-2) when written as an ordered pair.  

Hope this helps!

3 0
3 years ago
Read 2 more answers
What is the inverse of the given function? y = 7x2 -­ 3. A. B. C. D.
Sergeeva-Olga [200]
Y = 7x^2-3

x=7y^2-3


.......................


8 0
3 years ago
Read 2 more answers
Solve for x. Show each step of the solution. <br><br> 4(8-x)-32=98-5(3x+24)
Firlakuza [10]

Answer: x=−2

Step-by-step explanation:

Let's solve your equation step-by-step.

4(8−x)−32=98−5(3x+24)

Step 1: Simplify both sides of the equation.

4(8−x)−32=98−5(3x+24)

(4)(8)+(4)(−x)+−32=98+(−5)(3x)+(−5)(24)(Distribute)

32+−4x+−32=98+−15x+−120

(−4x)+(32+−32)=(−15x)+(98+−120)(Combine Like Terms)

−4x=−15x+−22

−4x=−15x−22

Step 2: Add 15x to both sides.

−4x+15x=−15x−22+15x

11x=−22

Step 3: Divide both sides by 11.

11x /11 = −22 /11

x=−2

8 0
3 years ago
Other questions:
  • For a certain data set the regression equation is y = 2 + 3x. The correlation coefficient between y and x in this data set _____
    11·1 answer
  • What is the value of x?
    15·1 answer
  • Which equation is the inverse of y = 16x^2 + 1?
    6·2 answers
  • Estimate the product by rounding 9x54
    14·1 answer
  • At a grand-opening sale, 20% of the first 500 customers won a prize. How many of the first 500 customers won a prize ?
    7·2 answers
  • HELP ASAP PLS!!’
    14·2 answers
  • Two airplanes are flying to the same airport. Their positions are shown in the graph. Write a system of linear equations that re
    9·1 answer
  • Dana is training to run a marathon. On Monday, she ran 10.2 miles. On Tuesday, she ran 11.4 miles. On Wednesday and Thursday, sh
    8·1 answer
  • The population of Rhode Island is approximately 1.059 x 10 to the sixth power, while the population of the Earth is approximatel
    7·2 answers
  • Which ordered pair is a solution of the equation? 2x+4y=6-y
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!