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
FromTheMoon [43]
3 years ago
9

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

Mathematics
2 answers:
Bess [88]3 years ago
6 0

Use substitution method

3a+9=54

3a+9-9=54-9

3a= 45

divide by 3

3a/3= 45/3

a= 15

Answer is a= 15

Phoenix [80]3 years ago
6 0

Answer:

a = 15

Step-by-step explanation:

3a + b = 54

3a + 9 = 54

3a + 9 - 9 = 54 - 9

3a = 45

3a divided by 3 = 45 divided by 3

a = 15

3 x 15 + 9 = 54

45 + 9 = 54

54 = 54

You might be interested in
How many minutes of news would the disc jockey have to play for every 60minutes of music
faust18 [17]
The same with this question you divide 60 by 6 and you get 5
3 0
3 years ago
A student has some $1 and 5$ bills. He has a total of 15 bills that are worth $47. How many of each bill does he have?
Trava [24]

Answer:

Seven one dollar bills and eight five dollar bills.

Step-by-step explanation:

8 + 7 = 15 bills

8 x 5 = $40

7 x 1 = $7

40 + 7 = $47

47 dollars and 15 bills.

7 0
3 years ago
Read 2 more answers
Layla is going to invest $5,200 and leave it in an account for 15 years. Assuming the interest is compounded monthly, what inter
AleksandrR [38]

Answer:

6.5%

Step-by-step explanation:

I just know

4 0
2 years ago
Why do the probability of an event and the probability of its complement add up to 1
Ad libitum [116K]
<span>the probability of an event and the probability of its complement add up to 1 because the total events are the even it self and its compliment, so its probability equal to 1 because these are all the possible events that will occur. for example a coin toss, an event head will happen 0.5, and its complement is tails which will also happens 0.5</span>
5 0
3 years ago
Look at the ingredients to make honey biscuits. Work out how much of each ingredient is needed to make: a) 100 honey biscuits. b
Svetllana [295]

Answer:

look bellow

Step-by-step explanation:

100:

25x4=100

50x4=200g

75x4=300g

75x4=300g

100x4=400ml

40:

25x1.6=40

50x1.6=80g

75x1.6=120g

75x1.6=120g

100x1.6=160ml

6 0
3 years ago
Other questions:
  • Simplify to create an equivalent expression.<br> −4(−11+4n)−3(−2n+9)
    8·2 answers
  • Toll booths on the New York State Thruway are often congested because of the large number of cars waiting to pay. A consultant w
    8·1 answer
  • Mr jones is planning to pant grass and place afence in a small area for his dog. The rectagular dimension are 12×15 feet. The gr
    12·1 answer
  • Please help with this question please
    15·1 answer
  • What is 1653.78367 to the nearest ten square meter? Please help
    12·1 answer
  • How many days is in:<br><br>3 weeks<br>5 weeks<br>7 weeks<br>9 weeks​
    6·2 answers
  • Function 2
    8·1 answer
  • What is one thing that you found interesting about future value and present value for compound interest? 100 words ^
    13·1 answer
  • HELP ITS MY LAST QUESTION WITH STEP BY STEP
    12·2 answers
  • layla buys 3.6 pounds of dried fruit. the dried fruit costs $4.55 per pound. layla wants to know the total cost of the fruit.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!