Step-by-step explanation:
what's the question ? it does not say.
I assume it is "how many packages of what size were sold ?"
x = number of small packages
y = number of medium packages sold
z = number of large packages sold
x + y + z = 9
7x + 12y + 15z = 86
y = 3z
these are the 3 equations we get out of the question.
we put the third equation into the other two :
x + 3z + z = x + 4z = 9
7x + 12×3z + 15z = 7x + 36z + 15z = 7x + 51z = 86
it of this first equation we get
x = -4z + 9
and putting that into the other equation :
7×(-4z + 9) + 51z = 86
-28z + 63 + 51z = 86
23z = 23
z = 1
y = 3z = 3×1 = 3
x = -4z + 9 = -4×1 + 9 = -4 + 9 = 5
so, 5 small, 3 medium and 1 large packages were sold.
Answer:
D. y= -5/2x - 1
Step-by-step explanation:
Hope this helps. Sorry if it doesn't
X³ + 216 = 0
x³ = 0 - 216
x³ = - 216 Take the cube root of both sides.
∛x³ = ∛-216
x = -6
Check:
x³ + 216 = 0, x = -6
(-6)³ + 216 = 0
-216 + 216 = 0
0 = 0 Correct.
Answer:
Step-by-step explanation:
We have been given that
We can use the formula for difference of cubes to simplify the function f(x)
difference of cubes - 
And g(x) can be written as
Thus, we have
On cancelling the common factors, we get
Answer:
your right if you thin your wrong B can be right too
Step-by-step explanation:
