All categories

2 years ago

Is 81 divisible by 3?

2 answers:

4 0

Add up the digits that make 81 as follows: 8 + 1 = 9

We know that if the sum of the numbers that make up 81 is divisible by 3, then 81 is divisible by 3.

Since the sum of the digits in 81 is divisible by 3, 81 is also divisible by 3. Thus, the answer to the question "Is 81 divisible by 3?" is as follows: 

Yes

AlexFokin [52]2 years ago

3 0

Yes 81 is divisible by 3
the answer is 27
because 81 divided by 3 = 27

You might be interested in

Pine Bluff Middle School is having its annual Spring Fling dance, which will cost \$400$400dollar sign, 400. The student treasur

nikklg [1K]

The correct answers are:

The inequality is 75+4t ≥ 400, and they must sell at least 82 tickets.

Explanation:

t is the number of tickets sold. They start out with $75, so that is where our inequality begins. Each ticket is $4; this gives us the expression 4t. Together with the $75 carry over, we have 75+4t.

They must make at least $400 to pay for the dance. This means it must be more than or equal to 400; this gives us 75+4t ≥ 400.

To solve this, first subtract 75 from each side:

75+4t-75 ≥ 400-75

4t ≥ 325

Divide both sides by 4:

4t/4 ≥ 325/4

t ≥ 81.25

We cannot sell a portion of a ticket, so we round. While mathematically this number would "round down," if they only sell 81 tickets, they will not have enough money. Therefore we round up to 82.

7 0

2 years ago

Read 2 more answers

Suppose Cotangent (theta) = StartFraction 5 Over 12 EndFraction, where Pi less-than theta less-than StartFraction 3 pi Over 2 En

Agata [3.3K]

Answer:

Sin theta = 12/13

Step-by-step explanation:

From the question;

Cot theta = 5/12

Kindly recall;

Cot theta = 1/ tan theta

Hence, tan theta = 12/5

Mathematically

tan theta= opposite/adjacent

to get hypotenuse, we will use Pythagoras’ theorem which states that the square of the hypotenuse equals sum of the squares of the two other sides

let hypotenuse be h

h^2 = 12^2 + 5^2

h^2 = 144 + 25

h^2 = 169

h = √169

h = 13

But sine theta = opposite/ hypotenuse = 12/13

5 0

2 years ago

Store B sells the same computer as in the Example for $1,300. Store B offers a 20% discount on the computer. The tax rate is the

I am Lyosha [343]

Answer:

$1,300 discount of 20%=$260

6 0

1 year ago

Last Tuesday, a parking lot had 80 cars. Of those 80 cars, 40% were tan, 20 were silver, and the rest were black. What perc

stepladder [879]

Answer:

Step-by-step explanation:

35%+28%=63%

37% of the cars were tan

7 0

2 years ago

(7a3 – 2a - 2) + (-5a + 3) =

astraxan [27]

Answer in attachments below.

Hope This Helps

5 0

2 years ago