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
Brut [27]
3 years ago
6

The radius of a circle is (7x+3)cm. Write an expression to represent the area of the circle in simplified form

Mathematics
1 answer:
zepelin [54]3 years ago
3 0

Answer:

A = π(7x + 3)² cm²

Step-by-step explanation:

A = πr² is the appropriate equation.  If r = 7x + 3 cm, then the area of this particular circle is:

A = π(7x + 3)² cm²

You might be interested in
Which of the following is a monomial?
KatRina [158]
The definition of monomial is an algebraic expression consisting of one term. 

a. 2xyz² is monomial.

b. 2x - yz is considered a binomial. (2 terms)

c. 2x + yz is considered a binomial. (2 terms)

d. 2 + xyz is also considered a binomial. (2 terms)

so the right answer is A.

hope this helped, God bless!
4 0
3 years ago
Mark can remember only the first 4 digits of his friend's phone number. He also knows that the number has 7 digits and that the
denis-greek [22]

Answer:

<em>19800 seconds, or 330 minutes, or 5 hours + 30 minutes</em>

Step-by-step explanation:

<u>Number Permutations</u>

We know the phone number has 7 digits, 4 of which are known by Mark. This leaves him 3 digits to guess with. We also know the last one is not zero. The number can be represented as

XXY

Where X can be any digit from 0 to 9 and Y can be any digit from 1 to 9. The first two can be combined in 10x10 ways, and the last one can be of 9 ways, this gives us 10x10x9 = 900 possible permutations.

If each possible number takes him 22 seconds, every possibility will need

22x900=19800 seconds, or 330 minutes, or 5 hours + 30 minutes

3 0
3 years ago
Which of the following fractions is smaller than<br> 1/2
Harman [31]

the answer is C: 3/7

5 0
3 years ago
State the value of the discriminant for <br><br>y = <img src="https://tex.z-dn.net/?f=5x%5E2%2B9x-3" id="TexFormula1" title="5x^
Nostrana [21]

Answer:

141, meaning that there will be two real solutions

Step-by-step explanation:

The discriminant of a quadratic is b^2-4ac, which in this case is:

9^2-4(5)(-3)=81+60=141

Since the discriminant is positive and not zero, there will be two real solutions to this equation. This is because when the discriminant is negative, and you take the square root of it, you get a negative number. If you take the square root of 0, you get 0, which means that there will only be one solution to the equation.

Hope this helps!

3 0
3 years ago
Pls help will mark brainliest
nevsk [136]

Answer: The constant proportionality is 5/4

Step-by-step explanation: The constant of proportionality k is given by k=y/x where y and x are two quantities that are directly proportional to each other. Once you know the constant of proportionality you can find an equation representing the directly proportional relationship between x and y, namely y=kx, with your specific k.

3 0
3 years ago
Read 2 more answers
Other questions:
  • Find the value of -20+ (-100)-(-100)+(-150)-300
    9·2 answers
  • How to find the difference
    5·1 answer
  • Christina paints canvases and sells the pieces at craft fairs. The function c(t) approximates how many canvases she paints per h
    13·1 answer
  • I confused a lot plz help
    8·2 answers
  • What is the Value of x? <br> 30 = x -17
    13·2 answers
  • 02
    8·1 answer
  • Add and reduce 2/7+ 16/21=
    10·1 answer
  • How is 1/2 and 4/8 equivalent​
    11·1 answer
  • Given: three halves times x minus ten equals fifty
    13·1 answer
  • Help! Scroll to see image!
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!