Let's say David's age right now is x years
x + 6 = 2(x - 7)
x + 6 = 2x - 14
x = 20
Therefor David is 20 years old
I think you get 35% by first adding up everyone that was surveyed so
<span>190+135+220= 545 </span>
<span>Next you would divide 190 by the total number of people surveyed so </span>
<span>190/545= 0.348... </span>
<span>Since there is an 8 next to the 4 you would round up therefore getting 35% </span>
<span>I think that is how they got 35%</span>
Answer:
Option 1
Step-by-step explanation:
3x - 7y = -7y + 3x
They have simply been moved to opposite ends of the equation.
Answer:
The answer is 18
hope this helps
have a good day :)
Step-by-step explanation:
Hello :
cscx = -5/2
1/sinx =-5/2
sinx=-2/5
sin²x+cos²x=1
4/25+cos²x=25/25
cos²x = 21/25
between 270 and 360 : cosx > 0 cosx=(<span>√21)/5
but : sin2x =2sinx cosx
sin2x = 2(-2/5)(</span>(√21)/5)
sin2x = (-4√21)/25
