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
schepotkina [342]
3 years ago
11

Erma solves an equation by first subtracting 8 from both sides of the equation. She then divides both sides by 8 and finds the s

olution. Which of the following gives the properties of equality that she used and their correct order?
Mathematics
1 answer:
BigorU [14]3 years ago
5 0
This is the concept of algebra, to get the inequality we proceed as follows; Erma subtracted 8 from both sides and divided both sides by 8 so that we can get the value of the unknown. The the properties used were:

Subtraction properties of inequality, which states that:
if a<b, then a-c<b-c

Division properties of inequality, which states that:
if a<b, then a/c=<b/c

 
You might be interested in
How is a function<br> different than a<br> relation?
Nastasia [14]
<h3><u>Explanation</u></h3>
  • Difference between relation and function.

Relation and Function both are same except for one thing.

Relation can have repetitive domain while Function cannot. We can say that Function is a relation without repetitive domain.

<u>Example</u><u> </u><u>of</u><u> </u><u>Relation</u>

{(1,1),(1,3),(2,5),(2,6),(3,46),(3,90)}

This is a relation because there are same and repetitive domain.

<u>Example</u><u> </u><u>of</u><u> </u><u>Function</u>

{(1,1),(2,4),(3,9),(4,16),(5,25),(6,36),(7,49)}

This can be classified as relation as well but relation that is function. We can say that function is a subset of relation. Remember that functions are relations that don't have repetitive domain while relations that are not function (or just relations) can have repetitive or same domain.

<u>Graph</u><u> </u><u>of</u><u> </u><u>Relation</u><u> </u><u>and</u><u> </u><u>Function</u>

Relations can have graphs along with Functions. The problem is you might not see set of ordered pairs but graph instead.

How can we tell if the graph is a function or just only relation? The answer is to do line test.

  1. First we draw a vertical line.
  2. See if the line intercepts the graph just one point or more than one.

If the graph intercepts only one point then it is a function. Otherwise, no.

5 0
3 years ago
A store marked up the cost of a $40 pair of
choli [55]

Answer:

$39.10

Step-by-step explanation:

$40 * 1.15 = $46

$46 * 0.85 = $39.10

7 0
3 years ago
What is the function rule​
kirza4 [7]

Answer:

the function rule is y=2x-2

8 0
3 years ago
A model for the population in a small community after t years is given by P(t)=P0e^kt.
LUCKY_DIMON [66]
\bf \textit{Amount of Population Growth}\\\\&#10;A=Ie^{rt}\qquad &#10;\begin{cases}&#10;A=\textit{accumulated amount}\\&#10;I=\textit{initial amount}\\&#10;r=rate\to r\%\to \frac{r}{100}\\&#10;t=\textit{elapsed time}\\&#10;\end{cases}

a)

so, if the population doubled in 5 years, that means t = 5.  So say, if we use an amount for "i" or P in your case, to be 1, then after 5 years it'd be 2, and thus i = 1 and A = 2, let's find "r" or "k" in your equation.

\bf \textit{Amount of Population Growth}\\\\&#10;A=Ie^{rt}\qquad &#10;\begin{cases}&#10;A=\textit{accumulated amount}\to &2\\&#10;I=\textit{initial amount}\to &1\\&#10;r=rate\\&#10;t=\textit{elapsed time}\to &5\\&#10;\end{cases}&#10;\\\\\\&#10;2=1\cdot e^{5r}\implies 2=e^{5r}\implies ln(2)=ln(e^{5r})\implies ln(2)=5r&#10;\\\\\\&#10;\boxed{\cfrac{ln(2)}{5}=r}\qquad therefore\qquad \boxed{A=e^{\frac{ln(2)}{5}\cdot t}} \\\\\\&#10;\textit{how long to tripling?}\quad &#10;\begin{cases}&#10;A=3\\&#10;I=1&#10;\end{cases}\implies 3=1\cdot e^{\frac{ln(2)}{5}\cdot t}

\bf 3=e^{\frac{ln(2)}{5}\cdot t}\implies ln(3)=ln\left( e^{\frac{ln(2)}{5}\cdot t} \right)\implies ln(3)=\cfrac{ln(2)}{5} t&#10;\\\\\\&#10;\cfrac{5ln(3)}{ln(2)}=t\implies 7.9\approx t

b)

A = 10,000, t = 3

\bf \begin{cases}&#10;A=10000\\&#10;t=3&#10;\end{cases}\implies 10000=Ie^{\frac{ln(2)}{5}\cdot 3}\implies \cfrac{10000}{e^{\frac{3ln(2)}{5}}}=I&#10;\\\\\\&#10;6597.53955 \approx I
3 0
3 years ago
4x - 1 = -13 show the work please
m_a_m_a [10]

Answer:

x = -3

Step-by-step explanation:

4x - 1 = -13

add 1 to each side

4x = -12

x = -3

5 0
2 years ago
Read 2 more answers
Other questions:
  • What is 32% of 60 as a decimal?
    8·1 answer
  • A farm is to be built in the shape of Quadrilateral ABCD, as shown below.
    15·1 answer
  • 5. Bob the Burrito is tumbling down a mountain, If Bob is going 20 m/s for 45 seconds
    5·1 answer
  • Meliza has 43 toy soldiers.She lines them up in rows of 5 to fight imaginary zombies.How many of these rows can he make?
    12·2 answers
  • PLEASE HELP I DONT UNDERSTAND AND MY HEAD IS HURTING I WILL GIVE YOU BRAINLIEST!!!! (LIKE LITERALLY MY HEAD HURTS) i will give 2
    15·2 answers
  • Vincent sets off from his home on a 70 km journey to his friend's house. He travels the first 40 km of his journey at an average
    11·2 answers
  • How many kittens weigh at least 3/8 pound?<br><br> Marked as brainless
    9·1 answer
  • James and Bethany Morrison are celebrating their 10th anniversary by having a reception at a local reception hall. They have
    5·1 answer
  • A car rental agency advertised renting a car for 24.95$ per day and 0.29$ per mile. If Kevin rents this car for 3 days, how many
    15·1 answer
  • Multiply.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!