Answer:
x = 6
Step-by-step explanation:
<em>Let's solve y for x + 2y = 8.</em>
x + 2y = 8
2y = -x + 8
y = 
x + 4.
<em>Let's solve y for x - y = 5.</em>
x - y = 5
y = x - 5
<em>Since both equations have been solved for y, we can combine them together into one!</em>
x - 5 = x + 4
x 
x = 4 + 5
1.5x = 9
x = 6
Hope this helped! If not, please let me know!
Green family=15n
n is number of hours
Bryant family= 40x
x is number of hours
15n+40x=1450L
n+x=55
use simultaneous equations
(15n+40x=1450)-(15n+15x=825)
25x=625
x=25hours
n=55-x
n=55-25=30hours
1. (x−1)(5x+8)−2x+5
=(x)(5x)+(x)(8)+(−1)(5x)+(−1)(8)+−2x+5
=5x2+8x+−5x+−8+−2x+5
Combine Like Terms:
=5x2+8x+−5x+−8+−2x+5
=(5x2)+(8x+−5x+−2x)+(−8+5)
=5x2 + x + −3
2. (−2+5)(3x+9)
=9x+27
3. 2x+5−8x+12
=2x+5+−8x+12
Combine Like Terms:
=2x+5+−8x+12
=(2x+−8x)+(5+12)
=−6x+17
4. (−x+3)(−5x−2)
=(−x+3)(−5x+−2)
=(−x)(−5x)+(−x)(−2)+(3)(−5x)+(3)(−2)
=5x2+2x−15x−6
=5x2 − 13x − 6
.245 hope this helps!! :)
