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
Sonbull [250]
3 years ago
10

If a is a negative number, then a(1/a) is equal to -1. If a is a negative number and b is a negative number, then product ab is

equal to a negative number
Mathematics
1 answer:
Firdavs [7]3 years ago
8 0

Both claims are false. In fact, a and \frac{1}{a} are one the multiplicative inverse of the other. This means, by definition of multiplicative inverse, that

a \cdot \dfrac{1}{a} = 1 \quad\forall a \in \mathbb{R}

So, it doesn't matter if a is positive or negative: the multiplication of one number and its inverse will always be 1: for example,

(-2) \cdot \dfrac{1}{-2} = \dfrac{-2}{-2} = 1

Similarly, when you multiply two number, the sign of the product depends on the sign of the factors as follows:

  • (+) \cdot (+) = (+)
  • (+) \cdot (-) = (-)
  • (-) \cdot (+) = (-)
  • (-) \cdot (-) = (+)

So, the multiplication of two negative numbers is a positive number.

You might be interested in
The length L of a rectangle is 4 units more than its width W. The rectangle's are is 252 square units. A) Write the equation tha
jek_recluse [69]

Answer:

w=14

l=18

Step-by-step explanation:

To find the dimensions, create an equation for its area and solve for each using the area formula A = l*w. The dimensions given are A = 252, w for width and l= w+4 (4 more than the width).

A = l*w\\252 = (w+4)*w\\252 = w^2+4w\\252+4 = w^2 +4w +4\\256 = (w+2)^2\\\sqrt{256} =\sqrt{(w+2)^2} \\16 = w+2\\16 = w+2\\14= w\\

The width is 14 so the length is l=w+4 or l= (14)+4 =18

3 0
3 years ago
Mr. Robins earns a commission on each airfare he books. At the end of the day, he had booked $208.60 worth of airfare and earned
Marina86 [1]

Answer:

  15%

Step-by-step explanation:

His rate is ...

  rate = commission/sales · 100% = 31.29/208.60 · 100%

  rate = 15%

Mr. Robins' commission rate is 15% of bookings.

3 0
3 years ago
Read 2 more answers
What is the measure of the corresponding central angle for XY in radians?
beks73 [17]

Answer:

4 radians

Step-by-step explanation:

Arc Length (Radians) = rθ

Given Arc Length XY  = 40cm and radius, r = 10cm,

we will substitute these 2 values into the formula to find θ.

(10)θ  = 40

θ = 40 / 10

= 4 radians

5 0
2 years ago
Read 2 more answers
What is the answer to this question it doesn't state the answer so can you please tell me the answer
DiKsa [7]
I DONT KNOW JUST STRAT WITH THE BEGGINIG OF THE SENTENCE 

5 0
3 years ago
Read 2 more answers
A __________ makes goods or offers services to others.
xxMikexx [17]

Answer:

producers or consumers

Step-by-step explanation:

4 0
3 years ago
Other questions:
  • NEED YOUR HELP ASAP!!!!
    8·2 answers
  • Which expression can be used to determine the reference angle for an angle, x, measuring 150°?
    14·2 answers
  • Which number line shows the graph of -0.7
    6·2 answers
  • Plzzzzzzzz will somebody help Ma in math
    10·2 answers
  • I dont understand please help
    11·1 answer
  • What is the equation of the line through (−2, −2) and (4, −5)
    9·2 answers
  • James was putting the table cloth back on the table after dinner. The table is 25 inches long and 10 inches wide. If the table c
    12·2 answers
  • Find the slope and y- intercept of points (-2,3) and (2,-3)
    13·1 answer
  • I need help with thiss plz
    12·2 answers
  • Write an equation and explain what the variables represent, please help.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!