Write the system of equations as a matrix equation AX
equals
=B, with A as the coefficient matrix of the system.

4 x
4x
plus
+
2 y
2y
minus
−
6 z
6z
equals
=
1
1
negative 6 x
−6x
minus
−
y
y
minus
−
z
z
equals
=
7
7
negative 4 x
−4x
plus
+
7 y
7y
plus
+
6 z
6z
equals
=
1
1

y=mx+b is the final answer!   : )

the answer for this question is 38

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

⇒

also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt

c

-by-step explanation:

it would be c