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
iogann1982 [59]
3 years ago
6

Can someone please explain this to me

Mathematics
1 answer:
Gre4nikov [31]3 years ago
8 0

What's happening is that every subtraction can be written as "addition of the opposite."

18-5 = 18 + (-5)

One reason this is done in the work you showed is that they're trying to show why you distribute the negative and the 1 into the parentheses, why you multiply everything in the parentheses by "-1" and not just 1.

The other reason is to later to be able to move the individual terms around, so you'll be able to combine like terms.

When you move terms around, the sign has to stay attached to the term, so writing all the subtractions as addition helps keep the sign attached.

You might be interested in
Which steps would you use to plot the point (7, −6, −5) in a 3-dimensional coordinate system starting from the origin?
I am Lyosha [343]

Answer:

B. move forward 7, left 6, and down 5

Step-by-step explanation:

By the <u>convention of 3D geometr</u>y, the coordinates of a point (x,y,z) represent how far the point is from the origin forward-backward , right/left , up-down respectively with prior one for the positive coordinate and latter for the negative coordinate.

so we need to move forward 7 for x=7 then to left 6 for y=-6 and then down 5 for z=-5.

3 0
3 years ago
Arne sells furniture. He is paid a salary by his store if $800 a month plus a commission on all sales. Last month his sales were
devlian [24]

I don’t know yet I’m solving it sorry

5 0
2 years ago
Please answer this, I’m a bit confused...
tatuchka [14]

Answer: The distance across a rectangular field is longer distance.

So, Perimeter of rectangle would be 120 yards.

Diagonal of square would be 56.56 yards.

3 0
2 years ago
1. Which diagram below shows the first step in parallel line construction on a point outside a
weeeeeb [17]

Answer:

B

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
For the Rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. For an 10 month period
Svetllana [295]
For a 10 month period the last term is 10 and the series sum is 55. For a 15 month period the last term is 15 and the sum is 120. For a 20 month period the last term is 20.
If u want the sum then it is 210.

Hope this helps you!
5 0
3 years ago
Other questions:
  • How much time passed between <br> 17:23:53 and 18:23:53
    7·2 answers
  • Alex is making puppets for a show. He bought string for$125. It costs $18 for the remaining materials needed to make each puppet
    9·1 answer
  • Find the value of x and y.
    14·2 answers
  • Please help!!!!!!
    12·1 answer
  • Becky and 3/4 gallon of gasoline into her snowthrowers empty fuel tank she uses 1/4 gallon for the snowstorm on Friday and then
    8·1 answer
  • Six<br> PRODUCT Identities involving the trigonometric ratios.
    15·1 answer
  • Please help me out with this please...
    11·2 answers
  • Frequency of y=sin0/3
    6·1 answer
  • Someone solve this for me pls ​
    13·1 answer
  • A. Slide the quadrilateral to a new location in the box and trace it.
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!