The answer is in the question. The question says he used 2/3 of it to make sandwiches. Unless your asking what 2/3 of 7/8 is then the answer would be 7/12.
you just multiply the top numbers together and the bottom numbers together and then reduce.
In standard form the answer will be if you go by (Ax+by=c )then I must say it's 3x-7y=9
15 divided by 8, you get 1 and 7/8
The first hose pumps out water at a rate of
(161 gal)/(3 h) = 161/3 gal/h
The second hose fills the pool at a rate of
(161 gal)/(2 h) = 161/2 gal/h
Working together, they can fill the pool at a rate of
(161/3 + 161/2) gal/h = 805/6 gal/h
so that it would take
(161 gal) / (805/6 gal/h) = 161×6/805 h = 6/5 h = 1.2 h = 1 h 12 min
to fill the pool.
When you plot the given points, you obtain the graph attached. As you can see, the function has two turning points, so:
Minimum degree=(2 turning points)+1=3
Therefore, the minimum degree of a polynominal model is 3, and it can be expressed as below:
f(x)=ax³+bx+cx+d
The answer is:3