1) Cecilia wants to switch over to T-Mobile for the unlimited everything plan for $89.99 which includes 20GB of 4G LTE each month; if she goes over 20GB per month T-Mobile will charge Cecilia $10 for each 1 GB over her
limit. Mr. D wants to switch over to Cricket for the unlimited plan for $59.99 which includes 15GB of 4G LTE
per month, if he goes over the 15GB per month Cricket will charge Mr. D $5 for for each 1 GB over his limit.
Which system of equations represent the situation? Let x represent the overage of GB's each month.
sy = 89.99x + 10
y = 59.99x + 5
(y = = 89.99 + 10x
b.
y = 59.99 + 5x
(y = 89.99 + 5x
y = 59.99 +10x
(y = 89.99x + 5
d.
= 59.99x + 10
a.
c.

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".

i can answer this question sweetie!

step-by-step explanation:

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

option 3 . (5x + 1) - (-10x + 6)

step-by-step explanation:

option 1 :

(4x + 3) + (-9x + 4)

or 4x+3 -9x + 4

or -5x + 7

option 2

(x - 2) - (6x - 9)

or x-2-6x + 9

or -5x + 7

option 3

(5x+ + 6)

or 5x + 1 + 10x -6

or 15x -5

option 4

-4x+2x+7-3x

-7x + 2x + 7

-5x + 7

hence only option 3 did   not satisfy the given simplify expression.