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Alex73 [517]
3 years ago
11

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

Mathematics
2 answers:
7nadin3 [17]3 years ago
8 0

Answer:

15

Step-by-step explanation:

When b = 9,

=> 3a + 9 = 54

=> 3a + 9 - 9 = 54 - 9

=> 3a = 45

=> 3a/3 = 45/3

=> a = 15

Therefore, when b is 9, a is 15

victus00 [196]3 years ago
5 0

Answer:

a=15

Step-by-step explanation:

First, you will plug in 9.

Then, you'll solve for a: 3a+9=54

Then, you'll subtract 9 from both sides. It will look like this: 3a+9-9=54-9

Then: 3a=45

Then you'll divide: 3a/3=45/3

And it gives you: a=15

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madreJ [45]

Answer:

27 years

Step-by-step explanation:

P is measured in thosands therefore, P will have a value of 120

so it would be...

120=80e^0.015t

80e^0.015t=120

e^0.015t=120/80=3/2=1.5

e^0.015t=1.5

0.015t= In(1.5)

t=In(1.5)/0.015

∴ t≈27.03 round it to 27 years

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7 0
2 years ago
What is the equation of this line in standard form? −8x+7y=25 −9x+8y=−23 −8x+9y=−23 −8x+9y=23
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5 0
3 years ago
Which of the values from the set (-7, -6, -2, 0, 1, 3) satisfy the inequality-5x + 5&lt; 25
Troyanec [42]

Answer: -2, 0, 1, 3

Step-by-step explanation:

when you multiply -7 and -6 by -5 than add 5 you get a higher number than 25.

when you multiply -2, 0, 1 And 3 by -5 than add 5 you get a lower number than 25.

4 0
3 years ago
Question 4 pleaseeeeeee
arsen [322]

Answer:

B

Step-by-step explanation:

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It means, we have to divide gallons by liters to get in terms of unitary liters.

Let's check the first line:

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Now, checking 2nd:

39/150 = 0.26 Gallons / 1 Liter

So, yes, they are the same and other 2 lines would be the same as well. The unit rate is:

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Vsevolod [243]

Answer: D

Step-by-step explanation:

4 0
3 years ago
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