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
vlada-n [284]
3 years ago
8

For what value of a​ is a(2x+3)=9x+15+x an identity?

Mathematics
1 answer:
dem82 [27]3 years ago
6 0

Answer:

Expand the left side, group like terms on both sides, and get

(2a)x + 3a = 10x + 15

To be true for all x, equate like terms from both sides and get

2a = 10

3a = 15

Solution: a = 5

You can test the answer.

Step-by-step explanation:

Expand the left side, group like terms on both sides, and get

(2a)x + 3a = 10x + 15

To be true for all x, equate like terms from both sides and get

2a = 10

3a = 15

Solution: a = 5

You can test the answer.

You might be interested in
You have a total of $3.25 in change made up of 25 pennies, 6 nickels, 2 dimes, and x quarters. How many quarters do you have?
coldgirl [10]

Answer:

10 quarters

x=10

Step-by-step explanation:

25 pennies equals to .25 ⊄

6 nickels equals to .30⊄

2 dimes equals to .20⊄

Add it up: 25+30+20=75⊄

You will then subtract .75 from our total:

3.25-.75=2.50

You need 2.50 in quarters; remember .50 for two quarters and 1.00 for four.

Eight quarters will equal 2.00

and two quarters equals 50.

Add it up, 10 for 2.50.

You will have 10 quarters.

X=10

7 0
3 years ago
I have no idea what this is. <br><br> g(-9)
vladimir2022 [97]
They are asking for the y coordinate of the g I guess
If that is the case, the answer is 1
3 0
3 years ago
Solve similar triangles
nalin [4]

Answer:

7.5 ?

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Find the perimeter of the colored part of the figure. The figure is composed of small squares with side-length 1 unit and curves
harina [27]

Answer:

16.56 in

Step-by-step explanation:

4 sides of the squares are exposed

The radius of each semicircle is 1 since they are against 2 squares.

2pi*r=circumfrence

2pi*1=6.28

6.28/2=3.14 because it's a semicircle

3.14*4=12.56 because there are 4 equal semicircles

12.56+4=16.56

4 0
3 years ago
Which inequalities is -5 a possible solution?
coldgirl [10]

Answer:

1st, 3rd and second last one

5 0
2 years ago
Other questions:
  • Anyone know the answer to this
    8·1 answer
  • What is the value of x in the product of powers below?<br><br><br> PLEASE HELP
    12·2 answers
  • Benny bought 8 new baseball cards to add to his collection. The next day his dog ate half his collection. There are now only 36
    11·1 answer
  • Solve this question 6×(11+3)
    10·2 answers
  • Kim is playing an online trivia game. She has 25 points and earns 1 each correct answer. She will advance to the next round if h
    14·1 answer
  • What two numbers have a sum of 191 and a difference of 63? *Hint: Create a system where one equation represents the sum and one
    8·2 answers
  • James, Priya, and Siobhan work in a grocery store. James makes $8.00 per hour. Priya makes 20% more than James, and Siobhan make
    15·1 answer
  • Whats the answer 6+1
    14·2 answers
  • PLEASE HELP ASAP SHOW WORK PLEASE!!!!
    8·1 answer
  • Points E, C, F are collinear and point C is in between. If EF = 14in and EC-9in, how long is CF?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!