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
astra-53 [7]
4 years ago
9

What is the value of a in the equation 3 a plus b equals 54 when b equals 9?

Mathematics
2 answers:
mars1129 [50]4 years ago
8 0

Answer:

a= 15

Step-by-step explanation:

Given

3a + b = 54 ← substitute b = 9

3a + 9 = 54 ( subtract 9 from both sides )

3a = 45 ( divide both sides by 3 )

a = 15

Tanzania [10]4 years ago
4 0

Answer:

3(15)+9=54

Step-by-step explanation:

A is equal to 15

You might be interested in
Melissa launches a rocket from a 3-meter-tall platform. The height, h, of the rocket, in meters, can be modeled by the given gra
Pachacha [2.7K]
We can model the function between a and b as a linear function of negative slope because it is a short interval and the change is not very significant.
 We have then that the average rate of change in that interval is:
 m = (f (a) - f (b)) / (a-b)
 Substituting the values:
 m = (34.25 - 26) / (2.5-3.6)
 m = -7.5
 Negative, because the function decreases in that interval.
 Answer:
 a reasonable estimate of the average rate of change of the height of the rocket, in meters per second, between a and b seconds is:
 m = -7.5 m / s
5 0
3 years ago
What is the slope of the graphed function?
Aleonysh [2.5K]
The slope is -1  as picking any two points, and finding (y2-y1)/(x2-x1)=-1
4 0
3 years ago
Verify which of the following are identities.
-Dominant- [34]

Answer:

Only the second equation is an identity

Step-by-step explanation:

$8 \frac{\tan^2(\theta)}{\sec(\theta)} \csc^2(\theta)=8 \csc(\theta)$

<u>Note that </u>

\tan^2(\theta)\csc^2(\theta)=\sec^2(\theta)

<u>You can confirm it: </u>

$\frac{\sin^2(\theta)}{\cos^2(\theta)}\cdot    \frac{1}{\sin^2(\theta)}= \frac{1}{cos^2(\theta)}= \sec^2(\theta)$

<u>Therefore</u>

$8 \frac{\sec^2(\theta)}{\sec(\theta)} =8 \csc(\theta)$

$8 \frac{\sec(\theta)}{1} =8 \csc(\theta)$

8\sec(\theta)=8\csc(\theta)

<h2>It is not an Identity</h2>

<u>Let's the second one</u>

$13 \frac{\tan^2(\theta)}{\sec(\theta)} \csc^2(\theta)=13\sec(\theta)$

In this case, we already performed the calculations, so it is true. It is an Identity.

3 0
3 years ago
Which of the following is a true statement?
Lelu [443]

Answer:

OC)

Step-by-step explanation:

FOE EXAMPLE:

4<u>8</u><u>8</u> eight is divisable by 4

1,222,2<u>1</u><u>6</u>

4 0
3 years ago
1. Consider drawing a single card from a well shuffled 52-card deck. Let E1 be an event of getting a heart card and E2 be an eve
Paraphin [41]
<span>1) Find P(E1UE2)
E1 probability= 1/2</span>
<span>There are 26 red cards in a 52 card deck, so the probability of choosing a red card is = 26/52 = 1/2
E2 probability= 12/ 52 or 3/13</span>
<span>The face cards are: Jacks, Queens, and <span>Kings. There are four suits, so in each suit there are one jack, one queen and one king. The probability is 3 x 4= 12 divided by the total number of cards.

2)</span></span><span>the probability of drawing a blue ball on the first draw: 4 /10
</span>the probability of drawing a white ball on the second drawn: 6/9 (because there is less one ball from the previous draw).
the probability of the cases together is 4/15 ( 4 /10 x 6/9) <span>since they are independent cases.</span>
6 0
3 years ago
Other questions:
  • How many cookies did the baker make before he opened the store? WILL GIVE BRAINLIEST
    8·2 answers
  • I need help with this problem 91+(-7)-5
    11·1 answer
  • Alex and Lara have $21.00 each to spend at a book fair, where all students receive a 35%; discount. They both want to purchase a
    13·1 answer
  • Which problem can be solved using the equation y=8×+50 ?
    14·1 answer
  • If the volume of a cube is 1,000 cubic feet what is the surface area
    8·2 answers
  • Jean is reading a book about astronauts. She reads 3 pages on Monday, 5 pages on Tuesday and 10 pages on Wednesday. What is the
    7·1 answer
  • speed in pages per minute ppm for for printers are 7.105 ppm, 7.221 ppm, 7.4 ppm, and 7.08 ppm. which shows the fastest printer
    10·1 answer
  • Which of the following is a factor of 7x^2 -12x-4?
    9·2 answers
  • #10 Please answer the question
    11·1 answer
  • Help appreciated!!!!!
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!