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
Alex17521 [72]
3 years ago
9

If (9x − 4)(9x + 4) = ax2 − b, what is the value of a? The value of a is _____________.

Mathematics
1 answer:
Lina20 [59]3 years ago
4 0
The factors, (9x - 4) and (9x +4), are obtained from factoring the sums of two square. Their product is obtained by subtracting the square of the second term from the square of the first term. 
 
                               (9x)² - (4)² = 81x² - 16

The values of a and b are 81 and 16, respectively. Therefore, the answer is 81. 

You might be interested in
The polygons in each pair are similiar help find the missibg length???
MariettaO [177]

Answer:

x = 40.

Step-by-step explanation:

The corresponding sides are in the same proportion so:

45/ 27 = 30/18 = x/24

Consider the last 2 fractions:

30/18 = x/24

5/3 = x/24           Cross multiply:

3x = 5 * 24

x =  120 / 3

x  = 40.

5 0
3 years ago
Add 3 7/12 +2 7/9. Simplify the answer and write as a mixed number.
AlexFokin [52]

3 7/12 = 43/12

2 7/9 = 25/9

both denominators must be the same to add together.

(25/9)x 12

(43/12) x 9

300/108 + 387/108 =

687/108

which in its simplest form is 229/36

and in a mixed number is 6 13/36

6 0
3 years ago
Read 2 more answers
If one check was written and one deposit was made into an account in one day, the account’s ending balance on that day _________
AlekseyPX
Hello! I believe the correct answer is C.


I hope that helped you! c:
7 0
3 years ago
There are currently 3 people signed up for the debate club. The school will not recognize the club officially until it has more
vodomira [7]
D because it does not have shaded, it’s not shaded so it does not include 2, and 3 and up people need to join the club still for it to be official
5 0
3 years ago
One angle of a right triangle measures 78°. What is the measure of the other acute angle?
muminat

Answer:

12°

Step-by-step explanation:

a right triangle implies there is an angle that is 90°

another angle is 78°

the third angle is 180 - (90 + 78)  =  180 - 168  = 12°

6 0
3 years ago
Other questions:
  • Richie and Saul are conducting a survey on the most popular board games played by students at their high school. Richie intervie
    15·2 answers
  • Based on the graph, which statement could describe Janelle's trip home from school?
    7·2 answers
  • Simplify 3^2/2-4-7/5-4
    12·1 answer
  • 0.9 ÷ 0.12
    9·1 answer
  • The figure shows a scale drawing of a room, and each square stands for 1 square foot. What is the area of the room in square yar
    14·2 answers
  • a jar contains 30 red, 40 blue, and 50 white buttons. you pick one button at random, find the probability that is not white
    13·1 answer
  • Find the value of x.<br> 5x<br> 55°
    13·2 answers
  • Please help ❤️ I’ll give most points and brainliest!
    6·1 answer
  • What is the equation of the line that passes through the point (-5, 5) and has a slope of -1
    11·1 answer
  • 568,319,000,000,000,000,000,000,000 in standard form
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!