Step-by-step explanation:
a)
well, it is kind of written already :
228 miles and 6 gallons.
so, miles/gallon = 228/6 = 38 miles/gallon.
b)
it is not mentioned, but I guess we have to assume that he got the same miles/gallon ratio on this trip as well.
so, again
38 miles/gallon
and he used 9 gallons.
so, he drove 38×9 = 342 miles
Half of 57 is 28.5. Hoped I helped. :)
Answer:
y=mx+b
Step-by-step explanation:
The slope-intercepts formula, the y = y coordinate, m = slope, x = x coordinate, b = y intercept
Erm
x+y=6
xy=12
x+y=6
y=6-x
sub back
xy=12
x(6-x)=12
6x-x^2=12
x^2-6x=-12
x^2-6x+12=0
quadratic formula
for
ax²+bx+c=0
![x= \frac{-b+/- \sqrt{b^2-4ac} }{2a}](https://tex.z-dn.net/?f=x%3D%20%5Cfrac%7B-b%2B%2F-%20%5Csqrt%7Bb%5E2-4ac%7D%20%7D%7B2a%7D%20)
for
x²-6x+12=0
a=1
b=-6
c=12
and remember that √-1=i
![x= \frac{-(-6)+/- \sqrt{(-6)^2-4(1)(12)} }{2(1)}](https://tex.z-dn.net/?f=x%3D%20%5Cfrac%7B-%28-6%29%2B%2F-%20%5Csqrt%7B%28-6%29%5E2-4%281%29%2812%29%7D%20%7D%7B2%281%29%7D%20)
![x= \frac{6+/- \sqrt{36-48} }{2}](https://tex.z-dn.net/?f=x%3D%20%5Cfrac%7B6%2B%2F-%20%5Csqrt%7B36-48%7D%20%7D%7B2%7D%20)
![x= \frac{6+/- \sqrt{-12} }{2}](https://tex.z-dn.net/?f=x%3D%20%5Cfrac%7B6%2B%2F-%20%5Csqrt%7B-12%7D%20%7D%7B2%7D%20)
![x= \frac{6+/- (\sqrt{-1})(\sqrt{12}) }{2}](https://tex.z-dn.net/?f=x%3D%20%5Cfrac%7B6%2B%2F-%20%28%5Csqrt%7B-1%7D%29%28%5Csqrt%7B12%7D%29%20%7D%7B2%7D%20)
![x= \frac{6+/- (i)(2\sqrt{3}) }{2}](https://tex.z-dn.net/?f=x%3D%20%5Cfrac%7B6%2B%2F-%20%28i%29%282%5Csqrt%7B3%7D%29%20%7D%7B2%7D%20)
![x= \frac{6+/- 2i\sqrt{3} }{2}](https://tex.z-dn.net/?f=x%3D%20%5Cfrac%7B6%2B%2F-%202i%5Csqrt%7B3%7D%20%7D%7B2%7D%20)
x=3+/-i√3
the numbers are 3+i√3 and 3-i√3
no real numbers tho
It is false that deserts advance linearly, in easily mappable patterns.
Deserts don't really have a pattern when they are advancing - there are so many ways they can do this.