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
Hitman42 [59]
3 years ago
15

Explain how you can find the sign of the product of two or more rational numbers

Mathematics
1 answer:
Solnce55 [7]3 years ago
8 0

Comparing two rational numbers

<span> Use fraction form: </span>

 

Make the denominators the same and compare the numerators. The number with the smaller numerator is smaller. For example, to compare a/b and c/d, we rewrite

 

a/b=a*d/b*d

<span>  = ad/bd and c/d = c*b/d*b=bc/bd</span>

 

Now just compare the numerators : "ad" and "bc"

 

<span>Multiplying and Dividing Rational Numbers  </span>

 

Multiplying and dividing rational numbers in decimal form is the same as multiplying and dividing integers. The decimal place of the product is the same of all decimals of all multiplied numbers. For example, 3.12*2.4.

 

Solution => 3.12*2.4=7.488

 

When multiplying or dividing rational numbers in fractional form, you multiply the numerators (N*N) and then multiply the denominators (D*D).

 

When dividing rational numbers in fractional form, first take the reciprocal of the divisor, and then multiply the numerators and the denominators.

 

Example => 5/9 divided by 2/7 .

 

<span>Solution => 5/9 * 7/2 =  35/18 </span>

 

 

Adding Rational numbers

 

Adding and Subtracting rational numbers in decimal form is the same as adding and subtracting integers.

 

Example => -3.54+2.79=-0.75

 

When adding or subtracting rational numbers in fractional form, first make the denominator equal, and then add or subtract the numerators. 

You might be interested in
You cut a 54-inch rope into four pieces. Twoof the pieces are the same length, a thirdpiece is twice as long as each of the twoe
antiseptic1488 [7]

Let's use the variable x to represent the length of the first and second pieces.

If the third piece has twice the length of the first and second, its length is 2x.

If the fourth piece has half the length of the first and second, its length is 0.5*x.

Adding all four pieces and equating to 54 inches, we have:

\begin{gathered} x+x+2x+0.5x=54 \\ 4.5x=54 \\ x=\frac{54}{4.5} \\ x=12 \end{gathered}

So the length of each piece is:

12 inches, 12 inches, 24 inches and 6 inches.

5 0
1 year ago
1.4 has 2 significant digits as a result of which one?
dimaraw [331]

Answer:

1 And 3

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Help me please with this math question! giving brainliest to the correct answer
Gwar [14]

Step-by-step explanation:

do 21×3.14= 65.94

then divide by 2 since its a semicircle

equals: 32.97

than find perimeter altogether

21+28+28+32.97= 109.97ft

5 0
3 years ago
Read 2 more answers
What is the vertex of the parabola whose equation is y = (x + 1)2 + 3?
Ilya [14]

Answer:

The answer would be -1,-3.

5 0
3 years ago
What is f(x)•g(x)?<br> f(x) = 2–2x+1<br> g(x) = 2x+1
Arada [10]

Answer:

fx

Step-by-step explanation:

just did it

5 0
3 years ago
Other questions:
  • Brian pays £465.98 a year on his car insurance. The insurance company reduces the price by 3.6%.How much does the insurance cost
    6·2 answers
  • What is the area of the parallelogram below? Use the formula a=bh
    8·1 answer
  • Find x, given that ΔABE ~ ΔBCD.
    15·1 answer
  • Evaluate the numerical expression. 1/2-(-3/4)
    15·1 answer
  • Which function below has the smallest slope? f(x) f(x) = 2x − 3 g(x) graph going through (0, negative 5) and (4, 3) h(x) x h(x)
    5·1 answer
  • Bradley is returning home from a place that is 2 kilometers away. The function y = 2,000 − 90x represents Bradley's distance fro
    14·1 answer
  • Convert 1.4x10^-8 to standard notation/long form​
    15·1 answer
  • Find the value of the variable in the isosceles trapezoid.
    10·1 answer
  • Please help ill give brainliest!!! Others get 5 stars and a thank you
    12·1 answer
  • [-3 1/4] greater or less than [-4]
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!