Answer:
x = 15
Step-by-step explanation:
given that y varies directly with x
mathematically we can express this as
y = k x , where k is a constant
step 1: find k
given x = 3 and y = 21
y = k x
21 = k (3)
k = 7
hence the equation becomes
y = 7 x
when y = 105,
105 = 7x
x = 105 / 7 = 15
-10x-10 = -3x+4
+3x +3x
————————
-7x-10 = 4
+10 +10
————————
-7x = 14
then divide -7 on both side of the equal sign
you’ll get x=-2
then plug in -2 as x into one of the equations ( it doesn’t matter which one)
y= -10(-2)-10 = 20-10= 10
so y=10
4 to the 1st is 4
4 to the 2nd is 16
4 to the 3rd is 64
4 to the 4th is 256
The inequality sign is greater than or equal to, which means the line would be solid and the shaded portion would be to the right of the line.
The correct graph would be A.
Answer:
56
Step-by-step explanation:
5x+80=360
5x=280
x=56
