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

the square root of what number? if you add that, then someone will probably answer the question.

i think the amount would be $140.62

46

step-by-step explanation:

given

height = 168 cm

formula

height =2.47*f+54.13

solution

168 = 2.47f + 54.13             subtract 54.13 from both sides

168 - 54.13   = 2.47f             combine

113.87 = 2.47f                     divide by 2.47

113.87 / 2.47 = f                   combine

46.1 = f  

answer: 46 cm