Answer:
-5 < x <=-2
Step-by-step explanation:
9<=1-4x<21
Subtract 1 from each side
9 -1<=1-1-4x<21-1
8 <= -4x < 20
Divide each side by -4. That means to flip all inequalities
8/-4 >= -4x/-4 >20/-4
-2 >=x > -5
-5 < x <=-2
The LCM of 63 and 84 is 252
Answer:
its b, decreasing
Step-by-step explanation:
Answer:
perimeter = 2(x + 5)
this is 2x + 10
x = 55 inches
Step-by-step explanation:
this question is a bit weird because they didn't put the units for 5, so I'm assuming it's in inches...
the perimeter of a rectangle will have two of each, so we can put the 2 outside the bracket since it applies to everything. We have x and we have 5 so put those in the bracket with a plus sign because you add when you're calculating the perimeter.
5 + 5 = 10
120 - 10 = 110 inches (this is 2x)
110 ÷ 2 = 55 inches
