Answer:
Step-by-step explanation:
We are given the following in the question:
Let 
be the proportion of the internet sales and 
be the proportion of the store sale.
Hypothesis:
We have to conduct a hypothesis to check that the Internet sales are more than 10 percent higher than store sales.
Thus, we can design the null and alternative hypothesis as:
Alternate Hypothesis:
The alternate hypothesis states that the proportion of the internet sales is greater than the proportion of store sales by 10 percent.
Answer:
1. velocity
Step-by-step explanation:
that is the answer above
put all the combos together first like -3xy
then the x's like -x + 7x +2x=8x
then the y's
then the whole numbers
-3xy+8x (then the y's) then the whole numbers.
I am not sure how you are writing the numbers above like -x 4 is that -x to the 4th power?
x^4 then the x^3 and so forth then the y's then the whole numbers.
Always start adding the highest x power numbers first like x^4 + 2x^4=3x^4 then work your way down. Maybe rewrite the problem please.
Answer: x=-1, y=8 and z=-5.
Step-by-step explanation:
The given system of equations:
3x - 5y + 2z = -53 (i)
x - 7y - 4z = -37 (ii)
5x + 9y + 2z = 57 (iii)
Multiply 3 to equation (ii)
3x-21y-12z= -111 (iv)
Eliminate (iv) from (i) , we get
-5y+21y+2z+12z=-53+111
⇒ 16y+14z=58
⇒ 8y+7z=29 (v) [divide equation by 2]
Multiply 5 to equation (ii)
5x-35y-20z= -185 (vi)
Eliminate (vi) from (iii) , we get
9y+35y+2z+20z=57+185
⇒ 44y+22z=242
⇒ 2y+z=11 [divide equation by 22]
⇒ z= 11-2y (vii)
Put value of z in (v) , we get
8y+7(11-2y)=29
⇒ 8y+77-14y=29
⇒ 6y=48
⇒ y=8
Put value of y in (vii), we get z= 11-2(8) =11-16=-5
i.e. z=-5
Put y=8 and z=-5 in (ii) , we get
x - 7(8) - 4(-5) = -37
⇒x-56+20=-37
⇒ x-36=-37
⇒ x = -37+36
⇒ x = -1
Hence, x=-1, y=8 and z=-5.
