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sukhopar [10]
3 years ago
10

PLEEAAAASE help if a+1 is divisible by 3 prove that 4+7a is divisible by 3 too

Mathematics
1 answer:
Lemur [1.5K]3 years ago
3 0

Answer:

Given a is 5

Step-by-step explanation:

I. Given a is 5

= a + 1

= 5 + 1

= 6

6 is divisible by 3 => true

II. Find 4 + 7a value

  = 4 + 7(5)

  = 4 + 35

  = 39

39 is divisible by 3 => true

III. Prove by

6 ÷ 3 = 3

39 ÷ 3 = 13

Hope that help :)

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taurus [48]

y≤ 3 when x is 0  and x≤ 3 when y is 0

The graph is attached in figure below

Step-by-step explanation:

We need to graph x+y is equal or less than 3

Writing in mathematical form:

x+y\leq 3

For solving we find x and y intercepts

The y-intercept can be found by putting x=0, y is :

0+y \leq 3\\y\leq 3

y≤ 3 when x is 0

The x-intercept can be found by putting y=0, x is :

x+y \leq 3\\x+0\leq 3\\x\leq 3

x≤ 3 when y is 0

Plotting these values on the graph:

The graph is attached in figure below

Keywords: Solving inequalities

Learn more about Solving inequalities at:

  • brainly.com/question/1465430
  • brainly.com/question/6703816
  • brainly.com/question/11788572

#learnwithBrainly

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3 years ago
25 points! Help Please...
castortr0y [4]
What do you notice about each solution? : 
Picture 1 - They never intersect/touch.
Picture 2 - They are intersecting.
Picture 3 - They are on top of each other.

What do you notice about the graphs for each set of equations? : 
Picture 1 - The lines are parallel.
Picture 2 - They are intersecting.
Picture 3 - They are on top of each other. (otherwise known as coincident lines).

What do you notice about each set of equations? : 
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Picture 2 - Both the slopes and y-intercepts are different for each equation.
Picture 3 - They have the same slope and same y-intercept.

What generalization can you make? : 
Picture 1 - When equations have the same slope but different y-intercepts they will be parallel when graphed.
Picture 2 - When the equations have different slopes and different y-intercepts they will be intersecting.
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4 years ago
Three consecutive integers have a sum of 51 . find the integers
nataly862011 [7]
Consecutive integers are 1 apart
they are
x,x+1,x+2

they have a sum of 51

x+x+1+x+2=51
3x+3=51
minus 3 both sides
3x=48
divide both sides by 3
x=16

16+1=17
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the numbers are 16,17,18
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3 years ago
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dangina [55]

Answer:

<em>The value of x is 4. Hope this helps you.</em>

8 0
3 years ago
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xxMikexx [17]

Answer:

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Step-by-step explanation:

You divide 30 by 4.5. 30/4.5= 6.67 so 6.67m/s is the correct answer.

5 0
3 years ago
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