Remember, if you add negative four, you're really subtracting four, or if you take away negative four, you're really adding four.
-n+(-4)-(-4n)+6
-n-4+4n+6 simplify
{-n+4n are like terms, so combine them. -n+4n is exactly the same as 4n-n, so flip them around if it helps. Just remember to keep the sign with the right number. Same thing with -4+6.}
Answer:
3n+2
Answer:
The length around the figure in terms of r is 2r (
+ 4).
Step-by-step explanation:
The perimeter of an object is the total length of the boundary of the object.
The figure consists two similar semicircle and a rectangle.
Adding the two semicircles, a complete circle is formed. The circumference of a circle = 2
r.
The rectangle has a length which is twice its height.
i.e l = 2h
But,
r =
(the diameters of the semicircles equal the height of the rectangle)
⇒ h = 2r
Thus, one side length of rectangle = 2 × 2r (l = 2 × h)
= 4r
The length around the figure in terms of r is:
= 2
r + 4r + 4r
= 2
r + 8r
= 2r (
+ 4)
The length around the figure in terms of r is 2r (
+ 4).
Answer: 1180
Step-by-step explanation: 4 20 dirhams mean :20+20+20+20= 80
5 100 dirhams mean:100+100+100+100+100=500
3 200 dirhams mean; 200+200+200= 600
so,80+500+600=1180
Its the last one because both have divisions of the same thing and don't worry I checked it twice