Answer:
35
Step-by-step explanation:
$15 - $7.65 = $7.35
7.35/.21 = 35
-5x + 3y = 19
-5x + 7y = 11
-1(-5x + 3y = 19) ==> 5x - 3y = -19
1(-5x + 7y = 11) ==> -5x - 7y = 11
5x - 3y = -19
-5x - 7y = 11
-10y = -8
/-10 /-10
y = 4/5 = 0.8
-5x + 3y = 19
-5x + 3(0.8) = 19
5x + 2.4 = 19
- 2.4 - 2.4
5x + = 16.6
/5 /5
x = 3.32
-5x + 3y = 19
-5x + 3(4/5) = 19
5(5x + 3(4/5) = 19)
25x + 12 = 95
- 12 - 12
25x = 83
/25 /25
x = 83/25
- Hope that helps!
PS: the x answers are the same thing, one is in fraction, while the other one is in decimal.
I think it is y=-.25
7*3 - 4y = 20
21 - 4y = 20
subtract 21 from each side
- 4y = - 1
divide each side by - 4
y= -.25
I think maybe it's the first one?
The speed of light is 3.0 ×108m/s.
We have ask about the theory of Albert Einstein,
According to einstein, nothing in the universe can move faster than light
<h3>
What is the speed of the light?</h3>
Albert Einstein said that nothing travels faster than the speed of light, and the speed of light is
So that the nothing can travels faster than the speed of light.
light travels with very high speed.
Therefore we get the correct option is 3.
That is the speed of light is 3.0 ×108m/s.
To learn more about the speed of light visit:
brainly.com/question/104425