Question

1.Solve
/x-1/5/=3

A.x=-14/5 or x=16/5
B.x=14/5 or x=-16/5
C.x=-14/5 or x=-16/5
D.x=14/5 or x=16/5

2.The table shows the relationship between two variables. Which selection describes the relationship?
X=1, 2, 3, 4
Y=2, -3, -8, -13

A.increasing; linear
B.increasing; nonlinear
C.decreasing; linear
D.decreasing; nonlinear

3.The ordered pair (1,3),(2,9),(3,27),(4,81), and (5,243)represent a function. What is a rule that represent this function?

A.y=x^3
B.y=3x
C.y=3^x
D.y=x+3

4.Suppose tuna is on sale for $0.90 a can, and you have a coupon for $0.40 off your total purchase. Write a function rule for the cost of n cans of tuna.

A.C(n)=0.90n-0.40
B.C(n)=0.40n-0.90
C.C(n)=(0.90+n)-0.40
D.C(n)=(0.40+n)-0.90

I think #1 is D, #2 is C, #3 is C, and #4 is A. please correct me if im wrong

Answer 1

I do not understand the notation for #1

2 change in y is constant -5 for changes of 1 in x
linear, down
you are right D

3 right

4 .9n-.4 yes A

Answer 2

#1 it the straight lines on the sides of the fraction x-1/5 then theres a line going down the right side of it and then =3

and for #2 you mean C??? you said D? but you said I was right so im confused.

Answer 3

#1 notation is | x-1/5|=3

Answer 4

x-1/5 = 3
x = 3 1/5 = 16/5
-x+1/5 = 3
x = -14/5
C