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
John bought 6 dumplings for $3.00.
Vedmedyk [2.9K]

For every 6 dumplings bought, you get charged $3.00 plus 7 cents for every dollar. Hope this helps:)

8 0
3 years ago
If f(x) = 5x − 3, which expression represents its inverse function?
tangare [24]

Answer:

f ^{-1}(x)=\frac{x+3}{5}

Step-by-step explanation:

To find the inverse of a function f (x) follow the steps below:

1) Make y = f (x)

y= 5x - 3

2) Solve for the variable x

y+3= 5x - 3+3

y+3= 5x

x=\frac{y+3}{5}

3) Exchange the variable x with the variable y

y=\frac{x+3}{5}

4) Make y = f ^{-1}(x)

f ^{-1}(x)=\frac{x+3}{5}

Finally, the inverse of the function f (x) is: f ^{-1}(x)=\frac{x+3}{5}

5 0
3 years ago
Line s passes through points (7, 10) and (2, 14). Line t is parallel to line s. What is the slope of line t?
notsponge [240]

Answer:

The slope of line t is -4/5.

Step-by-step explanation:

m=(y2-y1)/(x2-x1)

m=(14-10)/(2-7)

m=4/-5

Parallel lines have same slopes.

4 0
3 years ago
Find the area.<br><br>Parallelogram<br>A = 1/2 bh
JulijaS [17]
The area of parallelogram is not 1/2 bh, but only b×h

A = 16*18 = 288 ft^2

Anyway if the packet says 1/2bh [or (b*h)/2]....(16*18)/2 = 288/2 = 144 ft^2
6 0
3 years ago
Read 2 more answers
How do I find the midpoint of the segment with the given points
Leokris [45]
9 + (-4) = 5/2= 2.5
10 + 7 = 17/2 = 8.5
4 0
3 years ago
Other questions:
  • Value that makes the ratios equal<br> 4 to 10, 2 to ?
    15·1 answer
  • 8.1 = 0.9a, how do you solve?
    10·1 answer
  • Write an algebraic expression for the verbal expression, "17 less than k and 12"
    6·1 answer
  • a jar contains some marbles that are either white or red. the ratio of the number of white marbles to the number of red numbers
    15·1 answer
  • PLEASE PLEASE PLEASE HELP ME ANSWER THIS QUESTION QUICK!! The picture of the question is down below.
    15·2 answers
  • Seven it’s greater then five
    9·2 answers
  • Five more than one third of a number is -2 what is the number
    11·2 answers
  • If 123 and x are in proportion find the value of x​
    11·1 answer
  • B + 12x
    10·1 answer
  • Is the graphed function linear?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!