T T
5
s
Problem 1.3
X
There is a proportional relationship between the number of
months a person has had a streaming service subscription
and the total amount of money they have paid for the
subscription
After 6 months, a user has paid $47.94.
100
Cost ($)
80
70
Determine the coordinates of three more points on this
line.
60
Time(m)
Cost (C)
50
(6, 47.94)
40
30
20
10
0
1
2 3
4
5 6
7 8 9 10
Time (months)

b.an increase in a causes b to decrease

he used the algebra tiles correctly.

step-by-step explanation:

given : 3x(2x-1)

solution :

since he used algebra tiles .

armando's solution is the same in the solution shown in figure

as he distributed 2x into x and x and wrote them vertically

and also write   -1 vertically

and 3x into x and x and x and wrote it horizontally

performing the multiplication in the algebra tiles we get

and solving the given expression :

3x(2x-1)

since solving the expression using tiles   and solving the expression algebraically we get the same answer

thus   we can choose the first statement as the answer to this problem which is "he used the algebra tiles correctly".

arrange the equations with like terms in columns.

analyze the coefficients of x or y.

add the equations and solve for the remaining variable.

substitute the value into either equation and solve.

check the solution.

step-by-step explanation:

x = -4

step-by-step explanation:

- 20 - 4(x + 3) = 4x

=> -20 - 4x - 12 = 4x

=> - 32 -4x = 4x

=> -32 = 4x + 4x

=> - 32 = 8x

=> -32/8 = x

=> -4 = x