Step-by-step explanation:
The third option: 5x(x^2+3)(4x-5)
because FOIL first, inner, outter, last
The two parentheses become (4x^3-5x^2+12x)
then 5x outside multiplys that whole parentheses. To get your correct expression
31a6b5 i think if just add them but to put it in an expression you would need to perethisis the A together with the b together and the numbers together
<h3>
Answer: C. 12 pouches for $2.80</h3>
Explanation:
x = number of pouches
y = cost for having x number of pouches
To find the unit cost, divide y over x
For choices A through D we have the following unit costs
- y/x = 2.04/8 = 0.255
- y/x = 2.69/10 = 0.269
- y/x = 2.80/12 = 0.233 (approximately)
- y/x = 3.80/16 = 0.2375
We see that 0.233 is the lowest unit cost, so therefore, Choice C is the lowest cost per pouch.
15.6 - 11.7 = 3.9
3.9 ÷ 15.6 = .25
25% of change