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
hoa [83]
3 years ago
13

R + 8 - 5r = 2(4 - 2r) solve for r please

Mathematics
2 answers:
Musya8 [376]3 years ago
8 0

-4r + 8 = 8 - 4r

0 = 0 so it's like {}

defon3 years ago
3 0

Answer:

r = 0

Step-by-step explanation:

This is actually the first time I've actually had a equation with the variable equaling 0.

so first things first you have the equation:

r + 8 - 5r = 2(4 - 2r)

so you are going to add or multiply all the variable numbers together and the none variable numbers together like so:

r + (-5r) and (2*4) and (2* (-2r)) to get the equation looking like so:

8+ (-4r)= 8 -4r

you then add -4r to both sides to get this equation:

8+ ( -4r)= 8 -4r

    + 4r       +4r

8 = 8 + r

you then subtract 8 from both sides to get r:

8 = 8 + r

-8  -8

0 = r

to check substitute the 0 into r in the equation:

r + 8 - 5r = 2(4 - 2r)

0 + 8 - (5*0) = 2(4- (2*0))

8 = 8

Tada!!!

You might be interested in
Help me :) !
m_a_m_a [10]

Answer:

69

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Suppose the supply function for a certain item is given by S(q)= (q+6)2 and the demand funtion is given by D(q)= (1000)/(q+6).
nasty-shy [4]

Answer: The equilibrium point is where; Quantity supplied = 100 and Quantity demanded = 100

Step-by-step explanation: The equilibrium point on a demand and supply graph is the point at which demand equals supply. Better put, it is the point where the demand curve intersects the supply curve.

The supply function is given as

S(q) = (q + 6)^2

The demand function is given as

D(q) = 1000/(q + 6)

The equilibrium point therefore would be derived as

(q + 6)^2 = 1000/(q + 6)

Cross multiply and you have

(q + 6)^2 x (q + 6) = 1000

(q + 6 )^3 = 1000

Add the cube root sign to both sides of the equation

q + 6 = 10

Subtract 6 from both sides of the equation

q = 4

Therefore when q = 4, supply would be

S(q) = (4 + 6)^2

S(q) = 10^2

S(q) = 100

Also when q = 4, demand would be

D(q) = 1000/(4 + 6)

D(q) = 1000/10

D(q) = 100

Hence at the point of equilibrium the quantity demanded and quantity supplied would be 100 units.

7 0
3 years ago
F(x) = x + 13, then evaluate f(-2)
Lubov Fominskaja [6]
F(x)= x+13
F(-2)= -2 +13
= 11


You plug in -2 for the x
7 0
3 years ago
One Sunday, 120 days before Christmas, Aldsworth store publishes an advertisement saying ‘120 shopping days until Christmas'. Al
Lena [83]

Answer:

(a)18

(b)1089

(c)Sunday

Step-by-step explanation:

The problem presented is an arithmetic sequence where:

  • First Sunday, a=1
  • Common Difference (Every subsequent Sunday), d=7

We want to determine the number of Sundays in the 120 days before Christmas.

(a)In an arithmetic sequence:

\text{The nth term}, T_n=a+(n-1)d\\T_n \leq 120\\$Therefore:$\\1+7(n-1) \leq 120\\1+7n-7\leq 120\\7n-6\leq 120\\7n\leq 120+6\\7n\leq 126\\$Divide both sides by 7$\\n\leq 18

Since the result is a whole number, there are 18 Sundays in which Aldsworth advertises.

Therefore, Aldsworth advertised 18 times.

(b)Next, we want to determine the sum of the first 18 terms of the sequence

1,8,15,...

\text{Sum of a sequence}, S_n=\frac{n}{2}( 2a+(n-1)d)\\S_{18}=\frac{18}{2}( 2*1+(18-1)*7)\\=9(2+17*7)\\=9(2+119)\\=9*121\\S_{18}=1089

The sum of the numbers of days published in all the advertisements is 1089.

(c)SInce the 120th day is the 18th Sunday, Christmas is on Sunday.

6 0
3 years ago
What does < > 5 mean
bonufazy [111]
<5 means less than 5
≤5 means less than or equal to 5
> 5 means greater than 5
≥ 5 means greater than or equal to 5

Hope this helps:)
4 0
3 years ago
Other questions:
  • A bag contains 26 letters and 9 numerals. Aubrey draws two cards from the bag. What is the probability that she draws 2 numerals
    10·2 answers
  • A box of 500 business card cost $19.95
    7·1 answer
  • Kim performed a transformation on rectangle ABCD to create rectangle A'B'C'D', as shown in the figure below:
    15·2 answers
  • A man runs at the speed of 10 km/hr. How much time will he take to cover 2000 meters?
    7·1 answer
  • What is 7 rounded to the nearest whole number?
    11·1 answer
  • In the form of a paragraph, use complete sentences to describe some of your observations that helped you to conclude who researc
    10·1 answer
  • H<br> А<br> F<br> 50°<br> 19x<br> 10x - 5<br> G
    13·1 answer
  • Please help me!!! i’m terrible at math. i’ll mark you brainlist
    10·1 answer
  • Carmen participated in a read a thon.Mr.Cole pledged $4.00 per book and gave Carmen $44.How many books did Carmen read?​
    13·1 answer
  • 30 is 60% of what number
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!