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3 years ago

A number is divisible by 3 if the sum of the digits of the number is divisible by 3.

1 answer:

8 0

I believe the answer the the question A number is divisible by 3 if the sum of the digits of the number is divisible by 3. Is 504, it makes sense

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If submarine A is submerged at 13.5 feet below sea level and submarine B is submerged at 5 feet below sea level, which submarine

Marysya12 [62]

Submarine A is the answer

8 0

3 years ago

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Write an equation:Three sisters went shopping for Mother’s Day. Each sister bought a gift for their mom. Maggie spent 3 times as

masya89 [10]

Answer:

Karen spent $ 10 , Jasmine spent $20 , Maggie spent $30

When x disappears from the equation and the two sides of the equation not equal each other , then the equation has no solution

When x disappears from the equation and the two sides of the equation equal each other , then the equation has infinite solutions

Step-by-step explanation:

* Lets read the problem and solve it

- There are three sisters ⇒ Maggie , Karen , Jasmine

- Each sister bought a gift for their mom

- Maggie spent 3 times as much as Karen

- Karen spent half as much as Jasmine

- Altogether, they spent $60

- Let Jasmine spent x

∵ Karen spent half as much as Jasmine

∴ Karen spent 1/2 x

∵ Maggie spent 3 times as much as Karen

∴ Maggie spent 3 × 1/2 x = 3/2 x

∵ Altogether, they spent $60

∴ x + 1/2 x + 3/2 x = 60

∴ 3x = 60 ⇒ divide both sides by 3

∴ x = 20

* Lets find the share of each one

∵ Jasmine spent x

∴ Jasmine spent $20

∵ Karen spent 1/2 x

∴ Karen spent 1/2 × 20 = $10

∵ Maggie spent 3/2 x

∴ Maggie spent 3/2 x 20 = $30

* Karen spent $ 10 , Jasmine spent $20 , Maggie spent $30

* Lets describe what happens when an equation has no solution

- "No solution" means that there are no values of x satisfy the equation

- When x disappears from the equation and the two sides of the

equation not equal each other , then the equation has no solution

- Ex: solve the equation 2 + 2x – 8 = 7x + 5 – 5x

∵ 12 + 2x – 8 = 7x + 5 – 5x ⇒ add the like terms

∴ 4 + 2x = 2x + 5 ⇒ subtract 2x from both sides

∴ 4 = 5 ⇒ the two sides not equal

∴ There is no value of x satisfy this equation

∴ There is no solution

* Lets describe what happens when an equation has infinite solutions

- "Infinite solutions" means all numbers are solutions.

- When x disappears from the equation and the two sides of the

equation equal each other , then the equation has infinite solutions

- Ex: solve the equation 2x + 3 = x + x + 3

∵ 2x + 3 = x + x + 3 ⇒ add the like terms

∴ 2x + 3 = 2x + 3 ⇒ subtract 2x from both sides

∴ 3 = 3 ⇒ the two sides are equal

∴ All values of x satisfy the equation

∴ There are infinite solutions

3 0

4 years ago

Finding perimeter and area.

Aleks04 [339]

Answer:

1. P = 14cm; A = 10cm^2

2. P = 24cm; A = 12cm^2

3. P = 32cm; A = 63cm^2

4. P = 36cm; A = 80cm^2

5. P = 32cm; A = 60cm^2

6. P = 36cm; A = 81cm^2

7. P = 26cm: A = 30cm^2

8. P = 28cm; A = 49cm^2

9. P = 26cm: A = 42cm^2

Step-by-step explanation:

Formula to find perimeter for a rectangle:

length + width + length + width

l + w + l + w

Formula to find area for a rectangle:

length × width

l × w

Perimeter (P): 5 + 2 + 5 + 2 = 14

Area (A): 5 × 2 = 10

P: 6 + 2 + 6 + 2 = 24

A: 6 × 2 = 12

P: 7 + 9 + 7 + 9 = 32

A: 7 × 9 = 63

P: 10 + 8 + 10 + 8 = 36

A: 10 × 8 = 80

P: 10 + 6 + 10 + 6 = 32

A: 10 × 6 = 60

P: 9 + 9 + 9 + 9 = 36

A: 9 × 9 = 81

P: 10 + 3 + 10 + 3 = 26

A: 10 × 3 = 30

P: 7 + 7 + 7 + 7 = 28

A: 7 × 7 = 49

P: 6 + 7 + 6 + 7 = 26

A: 6 × 7 = 42

Area will always have its units squared (cm^2) because the formula requires we multiply the numbers and therefore the units: cm × cm = cm^2

4 0

3 years ago

Does anyone know this?

Komok [63]

Answer:

Hi there!

The correct answer is: (x+8)² = 73

Step-by-step explanation:

First you want to modify the equation: x² + 16x - 6 = 3 into x² + 16x = 9 by adding 6 on both sides.

Then you analyze the new equation, if you can see, 16x is positive which means two positive numbers have to be added up to equal a positive. Which eliminates the choices that have (x-8)²

And now you are left with two choices:

(x+8)² =73 and (x+8)² = -55

Now remember, when you factor out (x+8)² it equals to x² + 16x + 64

next let's bring it back to the very first equation: x² + 16x = 9

now which choice matches the result x² + 16x = 9. The answer will be (x+8)² = 73 because when you subtract 64 on both sides you get 9.

4 0

3 years ago

Drag the numbers below to put them in order from least to greatest:<br> -3 4 1 -4 -12 -6

Kisachek [45]

Answer:

it is -12, -6, -4, -3, 1, 4

8 0

3 years ago

Read 2 more answers