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
Vinvika [58]
2 years ago
12

Which property justifies the following equation 7 [6+5+(-6)=7 [6+(-6)+5]

Mathematics
2 answers:
olchik [2.2K]2 years ago
7 0
Commutative property
Brut [27]2 years ago
3 0
I believe that is the commutative property because u r moving the numbers around. 
You might be interested in
Find the value of y for which line a is parallel to line b.
alexdok [17]
Y+38°= 180 beacuse if a and b are parallel they are co interior angles. This means that they will at to 180.

y=180-38= 142°

Answer: 142°

Drew out some hopefully helpful pictures below. Hope they help! let me know if you still have any questions!

6 0
2 years ago
Sal's Sandwich Shop sells wraps and sandwiches as part of its lunch specials. The profit on every sandwich is $2 and the profit
Virty [35]
Hence it is a simply rearrangement of the equation to start with, in order to make  the subject:






This is the graph in 'slope-intercept' form. From here it is easy to see that gradient  = and that y-intercept = 490.

The easiest way to draw a straight-line graph, such as this one, is to plot the y-intercept, in this case (0, 490), then plot another point either side of it at a fair distance (for example substitute  = -5 and  = 5 to procure two more sets of co-ordinates). These can be joined up with a straight line to form a section of the graph, which would otherwise extend infinitely either side - use the specified range in the question for x-values, and do not exceed it (clearly here the limit of -values is 0 ≤ x ≤ 735, since neither x nor y can be negative within the context of the question - the upper limit was found by substituting  = 0).

In function notation, the graph is:



The graph of this function represents how the value of the function varies as the value of x varies. Looking back at the question context, this graph specifically represents how many wraps could have been sold at each number of sandwich sales, in order to maintain the same profit of $1470.

When the profit is higher, the gradient is not changed (this is defined by the relationship between the $2 and $3 prices, not the overall profit) - instead the -intercept is higher:






Therefore we have gleaned that the new y-intercept is.

Clearly I cannot see the third straight line. However the method for finding the equation of a straight line graph is fairly simple:

1. Select two points on the line and write down their coordinates
2. The gradient of the line = 
3. Find the change in  (Δ
4. Find the change in  (Δ
5. Divide the result of stage 3 by the result of stage 4
6. This is your gradient
7. Take one of your sets of coordinates, and arrange them in the form , where your  is the gradient you just calculated
8. There is only one variable left, which is  (the y-intercept). Simply solve for this
9. Now generalise the equation, in the form , by inputting your gradient and y-intercept whilst leaving the coordinates as  and 

For example if the two points were (1, 9) and (4, 6):

Δ = 6 - 9 = -3
Δ = 4 - 1 = 3
 =  = -1
I choose the point (4, 6)
6 = (-1 * 4) + c
6 = c - 4
c = 10
Therefore, generally, 

Within the context of the question, I imagine the prices of the two lunch specials will be the same in the third month and hence the gradient will still be  - this means steps 1-6 can be omitted. Furthermore if the axes are clearly labelled, you may even be able to just read off the y-intercept and hence dispose with steps 1-8!
5 0
3 years ago
Factor completely with work!<br> n^2-n-30<br> will give brainliest to the one who shows work!
NikAS [45]
Hope this is what you are looking for

4 0
3 years ago
An atom is a small unit of matter. A small atom measures about 0.0000000001 meter. Write the decimal as a power of 10?
Lemur [1.5K]
-0.01x10^9 just court how many zeros
3 0
3 years ago
The answer key says the answer is B, but I don't understand how it is decreasing...isn't the velocity shown to be increasing? An
german

Answer:

Acceleration and velocity are two different things.  The acceleration is the rate at which the velocity is increasing.  So while the velocity very well may be increasing, the rate (acceleration) at which it is, is decreasing.

8 0
3 years ago
Read 2 more answers
Other questions:
  • Can someone plz help me??
    11·1 answer
  • What must be true of two rational expressions before they can be added?
    9·2 answers
  • What is the inequality of -8 &lt;2x-4 &lt;4=
    9·1 answer
  • 2x=5 what do we divide by?
    10·2 answers
  • Debra plans to invest $2,250 for 10 years. She can invest in a savings account that pays 4% simple intrest or a savings account
    13·1 answer
  • Carlos walk to school on the 14th of 20 days in February which value is equivalent to the fraction of school days in February th
    8·1 answer
  • Simplify (18+t)(-3)+9
    8·1 answer
  • The graph of y=x^2-8x+6 has a minimum point. write down the coordinates of this point
    9·1 answer
  • What is the perpendicular slope of the line shown below?
    15·1 answer
  • Are the following lines parallel, perpendicular, or neither?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!