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
Free_Kalibri [48]
3 years ago
13

A rectangle has sides measuring (2x + 7) units and (5x + 9) units. Part A: What is the expression that represents the area of th

e rectangle? Show your work. (4 points) Part B: What are the degree and classification of the expression obtained in Part A? (3 points) Part C: How does Part A demonstrate the closure property for polynomials? (3 points)
Mathematics
1 answer:
andrey2020 [161]3 years ago
3 0

Answer:

Part A:  

(2x+7)(5x+9)

=(2x+7)(5x+9)

=(2x)(5x)+(2x)(9)+(7)(5x)+(7)(9)

=10x2+18x+35x+63

=10x2+53x+63

A)

The formula for determining the area of a rectangle is given as

Area = length × width

Given that the length and width are (2x + 6) units and (5x + 3) units, the expression for the area is

(2x + 6)(5x + 3) = 10x² + 6x + 30x + 18

Area = 10x² + 36x + 18

B)

The degree is 2 because the highest power of the terms is 2. It is classified as a trinomial because it has 3 terms.

C) it is closed under multiplication. the exponents in the polynomials are whole numbers(2 and 1). The whole numbers are closed under addition, which means that the new exponents formed are also whole numbers. The exponents were whole numbers before multiplication and doesn't change after multiplication.

Step-by-step explanation:

You might be interested in
Use substitution to determine which value of x makes the equation 12+x=14.2 true.
Elis [28]

<u>So brianly is glitched so here is the answer </u>

3 0
2 years ago
Read 2 more answers
2.
Oduvanchick [21]

Answer:

38cm taller

Step-by-step explanation:

jack is 178cm tall

the ladder is 280cm tall

jack standing on the ladder is 280cm taller

so 178+280=458

the tree is 420cm tall

458>420

which means that jack is now taller than the tree standing in the ladder

458-420=38

so jack is 38cm taller than the tree standing on the top of the ladder

5 0
3 years ago
F(x) = 3x + 2<br> What is f(5)?
nika2105 [10]

Answer:

17

Step-by-step explanation:

f(x) = 3x + 2

f(5) = 3(5) + 2

f(5) = 15 + 2

f(5) = 17

8 0
3 years ago
Read 2 more answers
Aubrey bought 5 packs of stickers each with 30 stickers. Izzy bought 4 packs,
Anuta_ua [19.1K]

They have 310 stickers in total

8 0
3 years ago
Find the intercepts. 25 POINTS!!!!!!!!!!!
slamgirl [31]

Answer:

What grade is this??

Step-by-step explanation:

3 0
2 years ago
Other questions:
  • 3. Timmy has a total of 15 dimes and nickels in his pocket. He has 7 more
    15·1 answer
  • In simplest radical form, what are the solutions to the quadratic equation 6 = x^2 - 10x
    11·1 answer
  • Find two numbers whose sum is 42 and whose difference is 16.
    6·1 answer
  • Bought a box 6 in long, 10 in wide and 4 in high. How much would it cost to cover with material that cost $0.25 per square in?
    8·1 answer
  • Is (5, 7) a solution to the equation y = x + 2?
    5·2 answers
  • In a class of 25 students, 16 have dark hair, 10 have brown eyes, and 4 have both dark hair and brown eyes. If a student chosen
    9·1 answer
  • What is the missing length?
    9·1 answer
  • MARKING BRAINLIEST ..Please
    11·2 answers
  • When adding two numbers, the number of significant figures in the sum is equal to the number of significant figures in the least
    12·1 answer
  • What is the relationship between the number of sides of the base of a prism and the number of lateral faces?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!