All categories

3 years ago

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

Mathematics

2 answers:

Hunter-Best [27]3 years ago

8 0

Answer:

$3a+b=54$

$3a+9=54\:[b=9]$

$3a=54-9$

Subtract 9 from both sides

$3a=45$

Divide both sides by 3

$\frac{3a}{3}=\frac{45}{3}$

$a=15$

<u>OAmalOHopeO</u>

Sergeeva-Olga [200]3 years ago

7 0

Answer:

a=15

Step-by-step explanation:

3a+b = 54

Let b=9

3a+9 = 54

Subtract 9 from each side

3a+9-9= 54-9

3a = 45

Divide each side by 3

3a/3 = 45/3

a = 15

You might be interested in

ツ---Graph y=-x^2-2. Identify the vertex of the graph.Tell whether it is a minimum or maximum.---ツ

balandron [24]

Hey!

Hope this Helps...

~~~~~~~~~~~~~~~~~~~~~~~~~

Below, I added what the graph of (x^2)-2 looks like...

The answer is A. (0, -2); Minimum

7 0

3 years ago

Read 2 more answers

Determine if the rates $168 rasied for washing 24 cars and $280 rasied for washing 40 cars are equivalent

Mariana [72]

We are given : $168 raised for washing 24 cars and $280 raised for washing 40 cars.

We know the rate formula.

Rate = Total amount ÷ Total numbers.

Let us find value of each rate for the given problem.

Rate 1: Total amount ÷ Total numbers = $168 ÷ 24 = $7.

Rate 2: Total amount ÷ Total numbers = $280 ÷ 40 = $7.

We can clearly see that Rate 1 is equal to Rate 2, that is $7.

So, we can say rates are equivalent.

3 0

3 years ago

Solve the system of linear equations by graphing.<br> y=-x+4.<br> y= 2x – 8

drek231 [11]

Step-by-step explanation:

suppose,x=1,2 .so y=1+4=5,2+4=6...eq..(I)

and y=2×1-8=-6,y=2*×2-8=-4

now plot in graph where they intercept with each other i.e x and y

I could plot but it's difficult here..and remember u can suppose any point as x for y

7 0

3 years ago

The letters a,b and c, represent nonzero constants. Solve ax+b=c for x

insens350 [35]

Answer:

$x = \frac{c-b}{a}$

Step-by-step explanation:

To solve for x, x needs to be on one side while all the other variables are on the other

To do this first subtract b from each side making the equation,

ax = c - b

Now divide by a on both sides. This means that to solve for x the equation must be ...

$x = \frac{c-b}{a}$

4 0

3 years ago

Plz help......idk what to pick I think D tho I just dont want to get it wrong

Anarel [89]

Answer:

$A.-1\frac{1}{7}$

Step-by-step explanation:

$Well, there\ is\ a\ simple\ way\ to\ approach\ it.\\-9\frac{2}{7} -(-10\frac{3}{7})\\-9\frac{2}{7} +10\frac{3}{7}\\Separate\ out\ the\ integer\ terms\ and\ the\ fraction\ terms.\\Hence,\\-9+10+\frac{2}{7}+ \frac{-3}{7}\\=1+\frac{2-3}{7} \\=1\frac{-1}{7} \\=-1\frac{1}{7}$

8 0

2 years ago

Read 2 more answers