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
Novosadov [1.4K]
2 years ago
13

You buy magazines for $5 and books for $10. You spent a total of $100. Let x represent the number of magazines and y represent t

he number of erasers. Write an equation to represent the situation.

Mathematics
1 answer:
bagirrra123 [75]2 years ago
8 0
The answer would be 10x+5y=100
You might be interested in
If y= 3x + 6, what is the minimum value of (x^3)(y)?
Rainbow [258]

Answer:

Given the statement: if y =3x+6.

Find the minimum value of (x^3)(y)

Let f(x) = (x^3)(y)

Substitute the value of y ;

f(x)=(x^3)(3x+6)

Distribute the terms;

f(x)= 3x^4 + 6x^3

The derivative value of f(x) with respect to x.

\frac{df}{dx} =\frac{d}{dx}(3x^4+6x^3)

Using \frac{d}{dx}(x^n) = nx^{n-1}

we have;

\frac{df}{dx} =(12x^3+18x^2)

Set \frac{df}{dx} = 0

then;

(12x^3+18x^2) =0

6x^2(2x + 3) = 0

By zero product property;

6x^2=0   and 2x + 3 = 0

⇒ x=0 and x = -\frac{3}{2} = -1.5

then;

at x = 0

f(0) = 0

and  

x = -1.5

f(-1.5) = 3(-1.5)^4 + 6(-1.5)^3 = 15.1875-20.25 = -5.0625


Hence the minimum value of (x^3)(y) is, -5.0625






3 0
3 years ago
Marissa is painting her rectangular patio, with the exception of a bench that does not need to be painted:
mars1129 [50]

Answer:

A = (x + 15)(x + 10) − 5

Step-by-step explanation:

(x+15)(x+10)-5=A would be a solution

To make this easier, let's assign x a value. Let's say 3.

(3+15)(3+10)-5=A

(18)(13)-5=A

234-5=A

A=229

Now with this, we put x in the answer choice and the answer that gives an area of 229 is correct.

A. A=(3+20)(3+10)+12=(23)(13)+12=299+12=311 <u>Answer A is wrong.</u>

B. A=(3+20)(3+10)-12=(23)(13)-12=299-12=287 <u>Answer B is wrong.</u>

C. A=(3+26)(3+15)=(29)(18)=522 <u>Answer C is wrong.</u>

D. A=(3+14)(3+8)=(17)(11)=187 <u>Answer D is wrong.</u>

It's either I'm wrong or the answer choices are wrong.

New answer choices!

A. A=(3+20)(3+11)

=(23)(14)=322 Answer A is wrong.

B. A=(3+15)(3+10)+5

=(18)(13)+5=234+5=239  Answer B is wrong.

C. A=(3+15)(3+10)−5

=(18)(13)-5=234-5=229 Answer C is correct.

D. A=(3+9)(3+10)=(12)(13)=156 <u>Answer D is wrong.</u>

5 0
4 years ago
Help me out with this please!<br><br> No links to suspicious sites other than Brainly!
Shalnov [3]

Answer: E and F.

E:

4 * 4 * 4 = 64, and 64 = 64.

F:

-1 * -1 * -1 = 1, and 1 = 1

6 0
3 years ago
Find an answer pls thanks
Bogdan [553]

Answer:

where's the question...?

Step-by-step explanation:

8 0
3 years ago
In a class of 30 students 60% said they walk to school
Mekhanik [1.2K]

moan and groan a lot ghjiouygbnjkh

3 0
3 years ago
Other questions:
  • -0.71x + 0.41x = 6.3<br> _x = 6.3
    8·1 answer
  • What is the answer for the large polygon and how do you find the answer.
    6·1 answer
  • Jack bought 5 pounds of holloween candy.He gave out 3 pounds of the candy to trick or treaters and ate 10 ounces of the candy.Ho
    14·1 answer
  • the diameter of the earth at the equator is about 8,000 mi. Based on this figure ,how far is it exactly around the earth
    8·2 answers
  • Which graph represents the PARENT function of y = x2 - 5?
    12·2 answers
  • 12/7=k/8 slove for k
    6·2 answers
  • There are 568 apples in the kitchen ready to make apple pies, if 50% of them are green, how many are green?
    9·1 answer
  • Circle O is shown. Line A E is a diameter. Line O C is a radius. A line is drawn from point C to point D on the opposite side of
    7·2 answers
  • Hope u help me pls I love u
    14·1 answer
  • I need help with this​
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!