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Mazyrski [523]
3 years ago
11

How to justify each step in the solution of 5x+15=0

Mathematics
1 answer:
velikii [3]3 years ago
8 0

Answer:

Step-by-step explanation:

The given equation is:

5x+15 =0

Subtract 15 from both sides:

5x+15-15= 0-15

By solving the like terms we get:

5x=-15

Divide both sides by 5

5x/5 = -15/5

Simplify:

x= -3...

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The volume of a sphere is approximately 44.6022 cubic centimeters. What is the radius of the sphere to the nearest tenth of a ce
Mumz [18]
The formula for the volume of a sphere is (4/3)*pi*r^3. Using this formula, we have 44.6022 cm^3 = (4/3)*pi*r^3. Solving for r, we get 2.2 cm. Thus, the radius of the sphere with an approximate volume of 44.6022 cubic centimeters is 2.2 cm. To add, the volume of a sphere is also exactly two-thirds the volume of its circumscribed cylinder. 
4 0
4 years ago
In a movie theater, the number of seats in a row is 8 greater than the total number of rows. How many rows are in the movie thea
Harman [31]

Answer:

26 rows

Step-by-step explanation:

this is like a rectangle length×width situation.

seats per row = s

number of rows = r

s × r = 884

s = r + 8

so, we can use e.g. the second equation in the first :

(r + 8) × r = 884

r² + 8r = 884

r² + 8r - 884 = 0

the general solution to such a quadratic equation is

x = (-b ± sqrt(b² - 4ac))/(2a)

in our case

x = r

a = 1

b = 8

c = -884

r = (-8 ± sqrt(8² - 4×1×-884))/(2×1) =

= (-8 ± sqrt(64 + 3536))/2 = (-8 ± sqrt(3600))/2 =

= (-8 ± 60)/2 = -4 ± 30

r1 = -4 + 30 = 26

r2 = -4 - 30 = -34

a negative number did not make any sense for the number of rows, so r = 26 is our answer.

8 0
2 years ago
**Select all that apply**
Arte-miy333 [17]

Answer:

a and d

Step-by-step explanation:

8 0
3 years ago
Whats the answer for 8p+21-p=7(p+3) show your work
mihalych1998 [28]
The answer is IMS,Infinite Many Solutions, because you have to do 7 (P + 3), which gives you 7p + 21. The on the other side you have to subtract 8p - p and that is 7p. So the equation would look like 7p + 21 = 7p + 21. IMS
7 0
3 years ago
Read 2 more answers
15% of what number is 72
icang [17]

Answer:

480

Step-by-step explanation:

7 0
3 years ago
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