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
Mumz [18]
3 years ago
5

What is the value of a in the equation 3a+b = 54, when b = 9? 15 18 21 27

Mathematics
2 answers:
liubo4ka [24]3 years ago
8 0
Answer
15
Step by step explanation
3a + 9 = 54
3a = 54-9
a = 45/3
a = 15
Hope it helped
Put your comments below
Ket [755]3 years ago
4 0

Answer:

15

Step-by-step explanation:

3a+9=54

-9        -9

3a=45

:3     :3

a=15

You might be interested in
PLEASE HELP ME I'M GIVING 20PTS AND MARKING BRAINLIEST!!!!
pishuonlain [190]

Using a trigonometric identity, it is found that the values of the cosine and the tangent of the angle are given by:

  • \cos{\theta} = \pm \frac{2\sqrt{2}}{3}
  • \tan{\theta} = \pm \frac{\sqrt{2}}{4}

<h3>What is the trigonometric identity using in this problem?</h3>

The identity that relates the sine squared and the cosine squared of the angle, as follows:

\sin^{2}{\theta} + \cos^{2}{\theta} = 1

In this problem, we have that the sine is given by:

\sin{\theta} = \frac{1}{3}

Hence, applying the identity, the cosine is given as follows:

\cos^2{\theta} = 1 - \sin^2{\theta}

\cos^2{\theta} = 1 - \left(\frac{1}{3}\right)^2

\cos^2{\theta} = 1 - \frac{1}{9}

\cos^2{\theta} = \frac{8}{9}

\cos{\theta} = \pm \sqrt{\frac{8}{9}}

\cos{\theta} = \pm \frac{2\sqrt{2}}{3}

The tangent is given by the sine divided by the cosine, hence:

\tan{\theta} = \frac{\sin{\theta}}{\cos{\theta}}

\tan{\theta} = \frac{\frac{1}{3}}{\pm \frac{2\sqrt{2}}{3}}

\tan{\theta} = \pm \frac{1}{2\sqrt{2}} \times \frac{\sqrt{2}}{\sqrt{2}}

\tan{\theta} = \pm \frac{\sqrt{2}}{4}

More can be learned about trigonometric identities at brainly.com/question/24496175

#SPJ1

5 0
2 years ago
1.3 billion people live on?
Lunna [17]

Answer:

1.25

Step-by-step explanation:

In India

4 0
3 years ago
Read 2 more answers
An expression to convert 50 miles per hours to miles per minute is shown
MariettaO [177]
Hello

The correct number would be 0.8333

Have a nice day
7 0
3 years ago
Read 2 more answers
Three friends go bowling the cost per person per game is $ 5.30 the cost to rent shoes is $ 2.50 per person.Their total cost is
siniylev [52]
Find cost of shoes first (7.50)
subtract from the total value (55.20-7.50= 47.7)
then divide by 5.30 (47.7/ 5.3= 9)

4 0
3 years ago
If u answer ill give brainlist
makkiz [27]

Answer:

120; 643 units squared

Step-by-step explanation:

Perimeter: Add all the sides, so 120 units

_________________________________

Area: First multiply 19 by 24 for the first shape within this other shape, so That equals 456 units squared. Since we know that one whole side is 36 we can subtract 19 from it to get the lower side of the smaller shape and then multiply that by 11. So the smaller side ends up being 17. So 17 times 11 equals: 187 units squared. Then just add the areas together 187+456=643 units squared.

3 0
3 years ago
Other questions:
  • Which expression is equivalent to (4(5^3)1/2?
    7·1 answer
  • A number of eggs ,e, divide by 12
    14·1 answer
  • Find the value of x.
    9·2 answers
  • When Angela turned 10, her parents deposited $5,000 in a college fund for her. When Angela enrolled in college at 18, her accoun
    14·2 answers
  • It has been observed that some persons who suffer acute heartburn, again suffer acute heartburn within one year of the first epi
    11·1 answer
  • I just want to know if I did this correctly or not. This is something I just learned today.​
    8·1 answer
  • Given that,<br>2a + 5b=22<br>b = 2<br>Find the value of a.​
    15·2 answers
  • A soccer field is a rectangle 100 meters wide and 130 meters long. The coach asks players to run from one corner to the other co
    13·1 answer
  • You can rewrite the trajectory equation as y = -16(x-1)^2 + 19
    12·1 answer
  • The Garden Task
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!