Answer:20x+50= 5x+70
Step-by-step explanation:
x = number of cavities
use the subtraction property of equality and solve for x
20x+50 = 5x+70
-5x -50 -5x - 50
15x = 20
Then you divide 20 by 15
15x = 20
----- -----
15 15
x= 4/3
Answer:
x = 4
Step-by-step explanation:
(6x - 3)° = (2x + 13)° are vertical angles that equal each other get x by itself and solve for x.
(6x - 3)° = (2x + 13)°
6x - 2x = 13 + 3
4x = 16
x = 4
Substitute x for the angles.
(6x - 3)° = ?
(6*4 - 3)° = ?
(24 - 3)° = 21°
(2x + 13)° = ?
(2*4 + 13)° = ?
(8 + 13)° = 21°
Given equation is
It can be written as follows.
Which is of the form
where a=3 and b=4.
We know that the coordinates of the vertices are (a,0) and (-a,0)
Substitute a=3, we get
The vertices are (3,0) and (-3,0).
We know that the coordinates of the foci are (c,0) and (-c,0)
Substitute a=3 and b=4, we get
Substitute c=5, we get
Hence the foci are (5,0) and (-5,0).
Answer:
210$
Step-by-step explanation:
30 + (20 * 9) =
30 + 180 = 210
It's 20 * 9 because there is 8 halves in a 4, and an additional half makes it 9 halves.
20 times 9 :)
And, of course, the 30 for the house call to start off with.
Total: 210$
Answer:
2x + 25
Step-by-step explanation:
Let that number be x.
<u>Step 1</u> : Multiply x and 2.
x * 2 = 2x
<u>Step 2</u> : Add 25 and 2x.
2x + 25
<u>Hence</u>,
25 is added to the product of a number and 2 is <u>2x + 25</u>.