Answer:
c. 6 hour
Step-by-step explanation:
time = t
25t + 50 = 27.50t + 35
solve for t : 25t + 50 = 27.5t +35
27.5t + 35 = (55t) /2 + 35 : 25t + 50 = (55t) /2 + 35
subtract (55t) /2 + 50 from bot side : -(5t) /2 = -15
multiply both side by -2/5: t = 6 hours
so.. whatever "x" and "y" amounts are, we know that, added together, they must yield 14lbs
thus x + y = 14
and whatever the cost of each is, 7x + 4y must be 14*5
7x+4y = 70
thus
solve for "x", to see how much of the $7/lb type will be needed
what about the $4/lb one? well, y = 14 - x
I'll go out on a limb here, and assume that you want a unit rate,
although technically, you haven't asked ANY question.
==> 13.66¢ per ounce
==> 7.32 ounces per dollar
Answer:
The zeros are (-5,-4,-1)
Step-by-step explanation:
Since we have a linear factor, we can use the method of long division to get the other factors
What this mean is that we simply divide the polynomial by the linear expression
we have this division result as;
By dividing, we have the other factor as ;
x^2 + 3x - 4
so we simply factorize this
x^2 -x + 4x - 4
x(x-1) + 4(x-1)
(x + 4)(x-1)
So the complete factors are;
(x + 5)(x + 4)(x-1)
To get the zeros, we simply equate each of the terms to zero
and we have our answer as;
-5 , -4 , 1