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
MAXImum [283]
3 years ago
5

Can someone please help me understand how to solve this? I can't seem to wrap my head around this concept so if someone could po

ssibly explain it to me or refer me to a great resource I'd be very thankful. Thank you!

Mathematics
1 answer:
iogann1982 [59]3 years ago
5 0

Step-by-step explanation:

Hi!

So, this is peicewise function. That means that x values have to be in a certain range in order to have a function. Look at this piecewise function, for example:

\left \{ {{7x+2       } \atop {x=2}} \right. { {{x=2} \atop {x=13}} \right.

When x is 2, you use the equation 7x+2.

When x is 13, you use the equation x=2.

Now we can use this graph to figure out the definition by looking at the points. An open circle means that a point can't reach that point (less than or greater than). A closed circle means that a point <em>can </em> touch there( less than or equal to and greater than or equal to).

So here, we have a closed circle at (-1, 1) and an open circle at (-1,2).

So, for all points that are less than or equal to -1, there will be a specific equation.

For all points greater than -1, there will be a different equation.

{this is based on x-values, btw}

So let's use these points to figure out the equations.

Check 2x + 2.

2(-1) + 2

-2 + 2 =0

This doesn't work.

Check 2x + 4

2 (-1) +4

-2 + 4 =2

This doesn't work.

Check x-2

-1-2 = -3

This doesn't work.

Check x + 2

-1 + 2 = 1

This works. Therefore, we can say that D is the answer.

You might be interested in
What is the GCF for 7x2 + 21?
laiz [17]

Answer:

35

Step-by-step explanation:

<u>7x2</u>+21

<u>14+21</u>

35

*The underlined problems is what you do first*

4 0
3 years ago
They are 100 questions on the math test salad answered 88 of those questions correctly what percent did she get correct on the t
Debora [2.8K]
88/100 = 0.88 = 88% were answered correctly
4 0
3 years ago
Bart opens a bank account and deposits $10 each week. If he has $90 in his account, how many weeks has he been depositing money?
Komok [63]

Answer:

9 weeks

Step-by-Step Instructions:

Step 1: State what is know

Bart deposits 10 dollars every week

Bart has 90 dollars in his account

Step 2: Find a way to solve for how many weeks Bart ha been depositing money

Total money in account / 10 dollars deposit per week = weeks he has been depositing

Step 3: Substitute in values and solve

90/ 10 = 9

Step 4: State your findings

Therefore Bart has been depositing money for 9 weeks

5 0
3 years ago
Solve the following equation 1÷x=2​
Troyanec [42]

Answer:

Your answer would be x = 1/2

Step-by-step explanation:

1/x = 2

You would divide x on both sides...then they would cancel each other out.

But now you're left with...

1 = x•2

So, re-order the terms so constants are on the left

1 = 2x

Divide 2 on both sides...

Now you're left with

1/2=x or more practically it would be x = 1/2

Hope this helps!

5 0
2 years ago
Translate this phrase into an algebraic expression.
Levart [38]

Answer:

(n*19)-4

Step-by-step explanation:

A product is the result of multiplication, so the product of a number (represented as n) and 19 would be n*19. Put these in parentheses, so that it remains organized and you don't become confused later.

Then 4 less would simply mean you subtract 4 from the product of n and 19.

(n*19)-4

7 0
4 years ago
Read 2 more answers
Other questions:
  • What is the scientific notation for 3734940000
    14·1 answer
  • What types of erosion creates caves?
    9·1 answer
  • A district manager rewards sales teams based on overall sales generated in a month. The data for earnings are shown in the table
    9·2 answers
  • Find the equation of a line passing through the point (-4,1) and perpendicular to the
    7·1 answer
  • Write the standard equation of a circle with center (-9,-4) and radius 15.
    13·1 answer
  • 6 cm<br> 4 cm<br> 7 cm<br> It’s a rectangular pyramid.
    13·2 answers
  • Convert 17 years into minutes​
    14·2 answers
  • GIVING BRAINLIEST PLEASE HELP
    6·2 answers
  • The ratio of 3 less than k to 2 more than k
    6·1 answer
  • Please help<br><br> Solve for x and y<br> 60 points!!!!
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!