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expeople1 [14]
3 years ago
8

A number is divisible by 3 if the sum of the digits is divisible by 3 true or false ​

Mathematics
1 answer:
shtirl [24]3 years ago
8 0
ANSWER:
It is true as the divisibility rule of three says -
WE HAVE TO ADD ALL THE DIGITS OF THE NUMBER AND IF THAT SUM IS DIVISIBLE BY THREE THEN THE PARTICULAR NUMBER IS DIVISIBLE BY THREE.
EXAMPLE 2+7=9 and 3*3=9
HOPE IT HELPS!!!!
PLEASE MARK BRAINLIEST!!!!
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Positive 10 minus -4
liubo4ka [24]
10-(-4)
Change the subtracting sign to a adding sign and whatever is on the right side of the sign must turn into it's opposite so: 10+4= 14

14 is your answer!!!!!!!
  
3 0
3 years ago
Read 2 more answers
The annual sales of romance novels follow the normal distribution. However, the mean and the standard deviation are unknown. For
Fynjy0 [20]

Answer:

Mean(m) = 462,536

sd = 29,268.29

Step-by-step explanation:

Given the following:

P(sales > 470,000) = 40% = 0.4

P(sales > 500,000) = 10% = 0.1

Using the z - table, we can locate the corresponding P values

Z = 1 - p = 1 - 0.4 = 0.6; 1 - 0.1 = 0.9

Locating the closest value to 0.6 on the z table ;

(0.25 + 0.26) / 2 = 0.255

Locating the closest value to 0.9 on the z table ;

Z = 1.28

Recall;

z =( x - m) / sd

Where m = mean ; sd = standard deviation

First condition:

0.255 = (470,000 - m) / sd

0.255 × sd = (470,000 - m) - - - - - (1)

1.28 = (500,000 - m) / sd

1.28 × sd = (500,000 - m) - - - - (2)

We can solve for one of the unknowns y subtracting equation (1) FROM 2

1.28sd - 0.255sd = (500,000 - m) - (470000 - m)

1.025sd =500,000 - m - 470000 + m

1.025sd = 30,000

sd = 29,268.29

Substituting the value od SD into (1) or (2)

1.28 × 29,268.29 = 500000 - m

37463.41 = 50000 - m

m = 50000 - 37463.41

Mean(m) = 462,536

7 0
3 years ago
Ned has 55 marbles in his collection he has twice as many white marbles as red marbles he has five more blue marbles than white
nika2105 [10]

Answer:

7 marble's

Step-by-step explanation:

55 marbles and twice as many white marbles as red marbles and he has 5 more blue marbles than white marble's

4 0
3 years ago
2.8 is 4% of what number
AnnZ [28]
70 you solve by making a proportion 2.8/x =4/100
4 0
3 years ago
A test asked students to find the ratio of circles to triangles.Greg got 5:2 as his answer and Paige got 2:5.Do there answers me
adoni [48]

Answer:

No.

Step-by-step explanation:

This is because 5:2 could mean there are 5 circles to 2 triangles and 2:5 could mean 2 circles to 5 triangles.

5 circles is not the same as 2 circles as 2 triangles is not the same as 5 triangles.

7 0
3 years ago
Read 2 more answers
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