Answer:
40 hrs
Step-by-step explanation:
She worked 1 hr for 10 and she got 400
54=12+r
'Sum' means to add.
Apoint on negative x-axis
-5x = 10 + 10
-5x = 20
X = 20/-5
X = -4
check :
-5 x -4 =20
20 =20