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Levart [38]
3 years ago
11

How to do number a and d?help please​

Mathematics
1 answer:
suter [353]3 years ago
8 0

Answer:

a. Let's call the first number x which would make the other 2 numbers x + 2 and x + 4. Since they have a sum of 54 we can write:

x + x + 2 + x + 4 = 54

3x + 6 = 54

3x = 48

x = 16 so the numbers are 16, 18, 20.

d. We can write:

30 + x = 4(3 + x)

30 + x = 12 + 4x

18 = 3x

x = 6 years

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Simplify the following by removing parentheses and combining terms<br> -(2q+6)+3(2q+4)-2q
Gelneren [198K]

Answer:

2q+6

Step-by-step explanation:

So basically, you would do this.

-2q-6+6q+12-2q

Next

-4q+6q = 2q

12-6=6

2q+6

7 0
2 years ago
Read 2 more answers
Y=4x+6, What does x equal
Neko [114]

Answer:

Step-by-step explanation:

1. Draw a line down the middle of the equal sign .

2.Divide 4x/4. Which equals x.

3. Divide 6/4. Which equals 1 and 2/4 or 1 and 1/2.

4. X=1 2/4

5. Check=

Y=4x+6

Plug 4 with 1 2/4. Which equals 6.

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X=1 2/4 Y=12

4 0
3 years ago
Read 2 more answers
What is the answer to this: 1-n=7/12
Zanzabum
You can add, subtract, multiply, and divide things on both sides of the equation as long as you do the same thing to the other side so 
if i add n to this side 

1-n+n

i must add it to the other side 

1-n+n= 7/12 +n

1=7/12 + n 
 
 now you must subtract the 7/12 from both sides

1 - 7/12= 7/12 - 7 /12 + n 

5/12= n

hope this helps!
5 0
3 years ago
how many different 7-place license plates are possible if first two are letters and last 5 are numbers
Alchen [17]

Answer:

67 600 000 different licence plates with repetition.

19 656 000 different license plates without repetition.

Step-by-step explanation:

3 0
3 years ago
The formula for the volume of a sphere is S = 4 3 πr3, where r (in feet) is the radius of the sphere. Suppose a spherical snowba
Soloha48 [4]

Answer with Step-by-step explanation:

We are given that

Volume of sphere=\frac{4}{3}\pi r^3

Where r= Radius of sphere in ft

a.r=\frac{1}{(t+1)^2}-\frac{1}{15}

\frac{dr}{dt}=\frac{-2}{(1+t)^3}

\frac{dS}{dt}=\frac{dS}{dr}\cdot \frac{dr}{dt}=4\pi r^2\frac{dr}{dt}

\frac{dS}{dt}=4\pi(\frac{1}{(1+t)^2}-\frac{1}{15})^2\times \frac{-2}{(1+t)^3}

\frac{dS}{dt}=\frac{-8\pi}{(1+t)^3}(\frac{1}{(1+t)^2}-\frac{1}{15})^2

b.Substitute t=1

Then, we get

\frac{dS}{dt}=\frac{-8\pi}{8}(\frac{1}{4}-\frac{1}{15})^2

\frac{dS}{dt}=-0.1056 ft^3/min

6 0
3 years ago
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