<h3><u>
The missing number is equal to -5.</u></h3>
-2(x + 9) = -8
<em><u>Distributive property.</u></em>
-2x - 18 = -8
<em><u>Add 18 to both sides.</u></em>
-2x = 10
<em><u>Divide both sides by -2.</u></em>
x = -5
It costs 1.75$ for 250 envelopes. each one of the envelopes cost 0.007$
Answer:
C.
Step-by-step explanation:
Given




Required:
Which condition proves that AB is perpendicular to CD
First, calculate the slopes of both.
<u>For AB</u>

<u>For CD</u>

The condition of perpendicularity is:

Substitute values for m1 and m2

Option (c) is correct
Lets get started :)
We need to find the radius of the larger cylinder
V =

r²h
960 =

r²(16)

60 =


r =

r ≈ 4.27 cm
The ratio of the bigger cylinder to smaller is:
16 : 4
Therefore, the big cylinder is 4 times bigger than the small cylinder

= r
r = 1.09 cm (radius of small cyclinder)
V (small cylinder) =

(1.09)²(4)
= 15 cm³Your answer will be C. 15 cm³
Answer:
x = 21
Step-by-step explanation:
The sum of the 3 angles in a triangle = 180°
Sum the given angles and equate to 180, that is
x -4 + 3x + 100 = 180, that is
4x + 96 = 180 ( subtract 96 from both sides )
4x = 84 ( divide both sides by 4 )
x = 21